It's nice seeing everyone's preferences when it comes to classical. That's one of the things I like about it, in fact, is that the genre is so vast that you and I could bond over liking classical music, and listen to none of the same composers! Plus, there's always more to discover and learn about.
I'm partial to Romantic myself, and I think I'd say my favorite composer is Tchaikovsky. I also listen to a lot of others, though, in other styles. I got into classical initially because I grew up in a very strict household that wouldn't let me buy popular music, so classical was always allowed. It's always pretty cheap, as well, which was great because I had very little money to spend on CDs, lol.