I'm fairly quiet but definitely get excited about a variety of things (often in and around my hobbies) and am eager to share them with people. I don't consider myself too fancy or picky, and have been taken to be notoriously uncritical of movies (I can usually find an enjoyable aspect to any film!) but it's more like I don't define myself by what I don't like (for example, I'm not the kind of person to make smalltalk about how such-and-such movie sucked and try to define my tastes in that way.)
I'm not particularly socially adventurous but I'm no stranger to meeting new people or doing new things.
I tend to finish things that I've started. I have lots of long terms projects and do my best to keep making progress on them. I've got a positive outlook on life. I enjoy my nerdy hobbies and while I don't necessarily broadcast them to the world, I definitely do not keep them in the closet. I may not be the leader of the group, or the one keeping the topics of conversation coming, but I'll always be there to at the very least try to get in a few quips now and again.
I like soda, mexican food, and internet memes. I love to discuss and philosophize and listen to other people do the same. I can easily get interested in topics and I enjoy listening to opinions and taking my time to mindfully figure out and respond with my own.
I've gotten pretty handy with the sewing machine after making almost two dozen costumes for conventions over the years (so far!) This year I'm working on Eren from Attack on Titan for myself, Annie from Attack on Titan and Shimakaze from Kancolle for a friend, and Yukari from Girls und Panzer for another friend, all of which take months and months of late nights after work. I can't say I'm the fastest at it, but I'm good at focusing on projects and actually owning up to what I say I can do.
Music: Dragonforce, Perfume, Capsule, Jonathan Coulton, Opeth, Great Big Sea, Houkagou Tea Time, Sonata Arctica, Ayreon, Tenacious D, Sambomaster, Frank Sinatra, Tay Zonday, Dream Theater, Shiina Ringo, Weird Al, Ken Ashcorp, etc.
Anime: Puella Magi Madoka Magica, Gurren Lagann, Saki, Attack on Titan, Steins;Gate, K-On, Nichijou, Kimi ni Todoke, Sora no Woto, Ano Hana, Clannad, Oregairu, Hourou Musuko, The World God Only Knows, Strike Witches, Genshiken, etc.
Games: GOD HAND, Starcraft 2, DayZ, League of Legends, Minecraft, EVE Online, Cave Story, Deadly Premonition, Shadow of the Colossus, Yume Nikki, TF2, Unreal Tournament, Japanese (aka Riichi or Reach) Mahjong, etc.
Things to think about!
Ways to actualize my ideas!
(Not sure what else...)