I won my first League of Legends PvP match going 21/1/11 with Diana on solo top lane.
For real though, probably the things I am most proud of are things like service.
Every year around Thanksgiving/Christmas time me and a bunch of families and friends from my church Ward go to the farm town 30 miles from us and go corn gleaning. Last year, we went gleaning and the Sunday afterwards, we were all notified that we had ended up feeding around 10,000 people.
Things like that make me proud. I can't think of one singular triumph like taking down an armed criminal or stopping a robbery.
Some things that aren't exactly "acts of pride" but things I did that I think are awsome are things like the time I was at an Airsoft Field (I play a lot) and we were doing a Night-Game (typically Night-Games are far more "simulated" than normal pick-up matches) and I and my two friends were in a fireteam together and the map we were playing on was about a 2 square miles (think of it as an "L" shape turned 90 degrees Clockwise") and at the start of the match we B-lined it for about 100 yards to the treeline since we really hadn't come up with a proper plan to take out the enemy (the objective was to infiltrate the enemy base, retrieve a hostage and lead him back to our base). During the rush, we had been fired on and one thing lead to another... sure enough I was alone in the pitch black backwoods of southern Florida (not the best place to be alone in the pitch black, on and by the way it gets dark at around 5:30-6:00 p.m. here) and for about half an hour I was slowly shadowing a couple flashlights I had spotted blinking about 300 yards ahead of me.
So for the next twenty minutes I was slowly getting closer and closer to the target.
Sure enough I was about 25 yards away, and after going Sam Fischer on their ass... I stepped on a branch and broke it. Sure enough the lights started strobing again, this time in my face, and through a series of maneuvers, of which to this day I have no idea how I pulled off, I dove, cralwed, sumersaulted(?) through the thicket. When I came out of my last roll, I popped up against a chest-high wall 6 foot by 6 foot board. I leaned from cover, shot one of my pursuers in the back and the other promptly turned and was lined right up to shoot my face.
Luckily I had just beaten Max Payne 3 earlier that day.
Suffice to say, my last pursuer was shocked... and had to go the dentist.
Oh and by the way, your friends that you end up getting split up with don't care how good of friends you are after you shoot them in the mouth three times with a 425 fps M4.