I always thought Hal would be my GL -- he's certainly the one I've read the most stories about. But for some reason, I never see a whole lot of dramatic potential in him, personally. To me, *he's* the one who should be labeled with the "dull as dishwater" label, not Barry.
I like John Stewart quite a bit, whether portrayed as a tactical ex-military man or an architect who's overcome his brash youth and his later self-doubt.
But even though I've read very few solo stories about Kyle Rayner, I have a hunch he's my GL. Mostly because of how I bristle when anyone calls him a "slacker."