another bike one - people who park with their cars sticking out into bike lanes. now, I don't mind riding in traffic & I don't require bike lanes - tho they are great of course, esp. for people who want things a bit lower-key (or for for all those moms & dads towing kids behind) & just to encourage cycling in general - but if it's there, it's like, respect it. it's a fucking bike lane. the whole point is to for people TO BIKE IN IT.
another one that drives me crazy is people who, despite a friendly verbal heads-up from a healthy distance, insist on opening their doors either right in front of me or right into me so that I have to swerve out to avoid getting doored. I know everyone's in a rush to get somewhere but jesus, you're going to get someone killed.
also people who turn abruptly right (it'd be left for you guys) w/o signaling first.
and on a related note, it's true, people who get on public transportation and expect not to have to sit next to anyone are the worst. I tell you, that ish does not fly on the El or buses in Chicago.