In addition to using the new year to reflect on the campaigns past, it's also an opportunity to think about the characters you had played and what types of characters you would want to make for the coming year. You don't necessarily have to plan out which systems and campaigns if you don't know what you're doing; rather, you can see what the characters you had played were and how you would play differently, or even if you want to.
One thing I've noticed is my tend towards non-human characters. In MonsterHearts, while J.J. is human, he is a demigod and has his Minotaur form. In games off mic, I've played multiple draconics (in a pair of 5th Ed. DND campaigns), a cat person (in the ADND game that's been ongoing since I started the hobby a few years back), and a Rodain (in Star Wars Edge of the Empire). Even into the future, the character I've got stated out for Eclipse Phase is a Pig Uplift. In most of the one-shots I have been in COC or Delta Green, as well as the upcoming Better Angels: No Soul Left Behind campaign, I've been forced to play as humans. There's no issue with playing non-human characters, but I might try to play more explicitly human characters in upcoming games.
Also with those characters are their personalities. This might come as a shock for people who have heard me play and GM, but I tend towards Lawful or Neutral Good characters who are usually moral and try to be good people. The hardest I've pushed is with J.J., and even then he mellowed out as the campaign progressed. While the physical character can be easier to shift around and change, changing the personality I play with will be harder. I don't want to go full scumbag, but in future character designs I should try to go for harder / colder people in addition to the nicer guys and gals.
These aren't necessities, mind you. It is good to grow as a role player, but there's two standards that you should always uphold: it should be A) a character you want to play and B) a character that will help the party. We play these games to have fun, so what is the point of playing a grim dark jerk when that's only going to make you miserable? If you feel like you are forcing yourself to play a paladin, or Sith, or werewolf, or what have you, is it worth it? And while it might be good to be a divisive character, if it breaks up the party in character it runs the risk of breaking relationships out of character.
Do you have any ideas for new characters you want to run? Anything that helped you get over the hump of making a new character? Tell us in the comments!