Everything pgil just said is spot on. You, as well as everyone else, has a selective memory. You remember the time when you get Aces ahead and get dogged by a donk who called with 73o preflop (trust me I remember it!). But we seem to forget, or even overlook, when we were a dog and outdrew the other guy.

In my opinion, the happiness you say you feel when your about to win, or the pain when you are about to lose, is simply how confident you are in your hand or how strong your hand is compared to your opponents range. I mean sure you feel happiness when you catch topset on the flop and dude openshoves into you. And you obviously feel pain when you can't get away from your straight to the obvious flush on the board. But I'm betting you don't have the happy feeling when you call with middle pair and win. Or happy when you call with a flush only to be beat by another flush.

As far as knowing the 4 was coming, you didn't know. You suspected that it might. And this time, it did, but were you really considering calling off your entire stack to see if it would? I sure hope not. And if it didn't come you would have been happy in your fold. I've folded 72o UTG before and had the flop come 772. Does that mean I should start opening 72o UTG? Nope, because the chances of that happening is slim. Even if I feel it will happen the next time I'm in that spot.