What is your favorite emote and the best situation to use it in?
There's several i've found good uses for. Living on a PvP server I think my favorite one, recently, has become /golfclap. You clap for [target], clearly unimpressed. What does that have to do with being on a PvP server? Well, quite simply there's a fair amount of lowbie ganking going on. I always take time to /sigh at high levels who attack me. And if they fail to kill me in just one shot, then I /golfclap at them, because they're apparently doing SUCH a spectacular job. They're completely pro at PvP... can't you tell?
That's one I do a lot IRL. I'm not entirely sure if it's a real emote in-game, but it should be.
There's a lot of IRL flailing going on.