I recently moved to Texas, away from my usual group, so I'm looking for a new group. I normally GM, but enjoy playing if a group has an established referee.
As a player, I'll play literally anything. (I joined a high-level party once and played a 0-level merchant, happily.) If I have a preference, it's skill-oriented or leader-style characters: bards, warlords (in 4e), rogues, followed by fighters. But I'm really not picky at all, and am happy filling in a needed party niche.
As a GM, I'm best suited for players who enjoy balance of gaming styles (combat, role-playing, puzzles, intrigue, humor, horror) and a setting that's part quasi-historical/part classic pulp fantasy novel, much like the game felt during 1st edition. (I prefer World of Greyhawk and homebrew worlds for D&D, but I like to experiment with settings and can shift with the group's preferences.) Mature/seasoned players, players with lives outside of gaming, and new players are most likely to find my games appealing.
That said, I respond to player wishes. If a group wants to play epic high-fantasy or dark Lovecraftian fantasy or Roman legion historical gaming, I can roll with it just fine. I've done them all, pretty much.
I have played D&D since 1st edition, the days of pencils, graph papers, lead miniatures, and character attributes rolled with 3d6, taking them as they fell. I have also dabbled in Cyberpunk, GURPS, Call of Cthulhu, Dark Conspiracy, Dream Park, and a bunch of other games, including a home brew. I have written some adventures, including one in DUNGEON. I have a full life, and tend to prefer playing about once a month these days. The rest of the time I spend writing, teaching (college English), or hanging out with my family.