The thing about playing poker around someone else (especially someone you love) is you make each other tilt. When either of us are having a bad run and complain about it, it affects the other one. That's probably what makes me tilt the easiest. Generally though I guess it's other styles of play, like when I get donked out on or whatever. Coin flips suck to lose too. When I'm having a bad day otherwise, I really really try to avoid starting up poker in the first place, because I know I'll start off tilting and play terribly. It's really hard to avoid playing though when you need something to distract you from life.