I walk if I feather it through to the keeper. They hear it behind me and I hear it, so why bother to wait for the correct decision! Plus, if the Umpire didn't give it, then the keeper, slips and I would know, so it would be worse to stay!!! For LBW I leave it to the Umpire to decide, as they have a better view than me.
I have been given out twice last season when I know I wasn't out - once when it missed the ball and because it swung as it went past my bat, the keeper claimed the catch and the umpire gave it even though I had missed!! And the second time was LBW when I took a huge step forward and to leg side (where the ball was heading) and it hit my thigh (I'm 6'3+) so it was too high, too leg-side, and I was down the track! But was still given!!
Actually just remembered a third.....full toss and I raised my arms and bat up otherwise it would have hit me around the bicep area. It deflected from my left are downwards and just caught the bail as it went through. And a no-ball wasn't called from the square leg umpire!!! I wouldn't mind but the bowler apologised straight away for bowling a huge no ball and the square leg umpire was on my team......D1ckhead!!
But I'm sure I've also had the benefit of the doubt occasionally too!!