Alignment bugs me. We did one chaotic evil campaign, and that just completely went to hell, so now we're all forced to be at least neutral if not good. In the most recent campaign, someone made my character for me (lawful good cleric), which meant that everyone kept reminding me I was lawful good, and trying to use that to control me.
Unfortunately, being lawful good didn't work out to well. We were in a room full of pitfalls that dealt non-lethal damage, and the figher kept pushing me into them, at which point I struck back at her, hitting her with my great axe and dropping her into one of the pitfalls. But obviously this action (though I consider it justified) wasn't lawful stupid, so my God abandoned me, and the good paladin (along with the rest of the party) decided to stop me. I hit the ranger for almost all the HP she had, then the paladin disarmed me, to which I responded by charging at him and knocking him back into the pit where he started bleeding to death. Then I grab my axe, finish off the ranger, and try to run, but the summoner stopped me.
And this is why I hate alignments. Personally, I just like to be neutral, so I can be good without feeling obligated to be good.