[goofball]

For whatever reason the taxi line dude bugs me. He's always standing there with bills in his hand, just to make sure people know he takes/wants tips, then he does something for me (open the door and tell the driver where I'm going) that I'd prefer to do myself.

Tipping extra because you like doing it or because making someone feel great for a few extra dollars is obviously just fine. The thing that sucks is when people tip because they feel like they have to or are afraid they will be looked down on. I guess that's the part of the tipping culture that annoys me.