As someone who is interested in a number of career choices in writing, I've spent the past year and a bit on PA, working on building characters. This could be from making incredibly long character applications (as I'm apparently known to do), to taking months to work out exactly why a character says a certain phrase or acts one way around some people but differently around another.
Here are some things I've started doing in order to build my characters and make them more realistic and relatable, if not more fun to post for. Each of the following are ideas I had, which came from TV shows, admittedly, but are actually super helpful.
Late Night Headcanons
This is my current favorite, and shamelessly ripped off from Jimmy Fallon's Late Night Hashtags, among his other segments. I made it up a few nights ago, and really love it so far. I personally use Polyvore for this, but it can be done any number of ways.
Each night, I pick a character that I really want to find something new for, and decide (or, as I put it, "find out") something about their past, their future, or their relationship with another character, be it my own or someone else's.
Here is a collection of the ones I have done on polyvore. You don't need an account to view them, though I fully support the idea of starting one. We use it to tag other members of PA in sets for specific threads, and also use it for plotting, though that can be done just as easily on here if it's not your thing. I do most of my plotting on PA, and of my personal planning on polyvore.
Link To My Sets
So, the idea is that I take - say, Avery Ivanov - who, even though I post with her frequently, I do not know enough about her to create many new plotting opportunities outside of my typical writing partners. So I considered the relationship I built for her and Keiran Hayes, another of my characters, and developed it even further in LNH pt. 3, which can be found in my collection.
Not only do these sets help YOU figure out what to do with your character, it helps those who want to plot with you learn more about your characters before diving into a thread with them. Sometimes characters come off as very strange if you don't know their story. While this can be helpful for plotting at times, it can actually hinder the relationship between writers as well as characters when your writing partner doesn't understand what's going on in your character's head.
Scenes From A Hat
This one, from the show "Whose Line Is It Anyway?", is more simple that it might sound. You don't need a hat, and you don't need an audience to give you suggestions.
Have you seen a show with a plot that intrigued you? Or maybe you like to read a lot - be it novels, nonfiction, or even fanfiction? Not to mention plots you've seen on PA!
ASK YOURSELF: What would your character do if that happened to them? Would they use sarcasm? Get angry? Would they just ignore the problem if there is one?
If you want to roleplay it with a partner (or several!) that's totally up to you. Part of this one is me just considering it as I watch a film or as I'm trying to fall asleep (because goodness knows my brain never wants to shush when I'm tired). It's probably more fun to write out, but recently I just hadn't found the time. I'm planning to put this one into action, myself, quite soon.
Battle of the Block
If you watch the show Big Brother, you know about this weekly challenge, which sets apart the players who are in jeopardy of losing their spot in the house, and losing a chance at the cash prize for the winner. Now, this isn't me suggesting you go about evicting your characters, or anyone else's. Instead, I'm asking you to consider the types of games played, as well as others that could - and perhaps should - be played on that show.
Speed. Balance. Multitasking. Knowledge. Countless others.
What is your character good at? Are they better at it than your other characters? Or are they worse than characters they know? You never want a character that is brilliant at everything. That ruins opportunities for plotting where another character could help yours and create friendships. Or they could be teased to make a new enemy.
The important part to remember is THIS: All characters need relationships of every kind to create fulfilling plotting. They need anything any normal person would have, relationship wise, or they won't be a full, rounded person. If they don't have an enemy, they can't grow as a person by choosing to do the right thing. Or they can't fall to the "dark side" by choosing to hurt that enemy. If you have a character that is great at everything, few people will be interested in being associated with them for lack of chances and lack of changes. By having a character with flaws, you can help someone else's character with flaws of their own.
Voted Off the Island
Watch Survivor? Even if you don't, you're bound to know this saying. Again, don't go shunning any characters. Consider the following:
If all of your characters were on an island, which would be the first to be sent away? Who would tell the lies to get what they wanted? Who would ask to go home because they just couldn't handle being in nature that long (heaven forbid!)?
OR, alternatively:
If your character was on an island with the characters belonging to your closest roleplay partners, what would they do? Would they trick their way to the end? Or would they make a mistake and be taken out?
This is another example of having to know the limitations of your character. For this example, as well as the Battle of the Block, you're welcome to accept the fact that they can use magic, as the site revolves around it, but I suggest that you consider what they would do if their wands were taken. Or if they were placed on this island with people they don't trust. You have to be willing to accept failure from your character, and take them seriously. If you have a first year, he clearly would be unlikely to win over a graduate with more physical strength or endurance or whatever the issue.
For example, if I put Avery Ivanov and a few of my other characters on an island, I know that Avery would not make it to the end. She would end up feeling guilty, and putting others before herself, because that is the mentality I have created for (and found in) her. It would be a dramatic overstatement to say she could actually win the whole thing.
This page may be updated over time if I come up with other ideas/games for character building. For now, I hope these help you understand your characters more fully, and create new opportunities for you in your writing!