There was a time when I had loads of spare time and nothing to expend it upon other than video games (other than going outdoors where I hear there is no climate control). Being young and therefore lacking in income, I didn't come across new video games often, so I generally played one game at a time until I either became so incredibly good that all the fun was lost or until a new game made it's way into my cd tray. Even in that span of time I rarely achieved a level of skill that I would quite literally expect to win against any foe in the same fashion that I expect the sun to rise every day: there was no doubt just a sense of inevitability.
The first of such games was Goldeneye for the N64. I cannot even begin to imagine how many hours I expended mastering the nuances of that game, or even how many controllers were slowly destroyed in the process. Since the game only supported local multiplayer (as was the fashion at the time) I only played against people in my community, but none could stand against me. In retrospect, I'm sure that there are plenty of people in the world who could have bested me, but none of them ever mentioned the game within earshot of me.
The second game was Tribes, specifically using the Renegades mod. I started my days as a lowly burster, using absurd firepower to make up for lackluster skills. Eventually, I discarded the bulky repair gun for an energy pack so I had better mobility and this marked the start of my trend in that game. As my skills increased my need for firepower was overshadowed by my constant need for maneuverability. I progressed from burster to mercenary and finally into the ranks of the scouts. With only two weapons at your disposal and incredibly limited supplies of ammunition and health, playing as a scout always involved subtlety, finesse and acute awareness of your battlespace all done at breakneck speeds. I was always loathe to try to capture flags unless the opportunity blatantly presented itself, and instead I would loiter near the most common avenues of approach and did my best to ensure no enemy would pass while I lived. There were times where I would rack up dozens of kills in a life - everything from ambushing a wounded sniper to white knuckle duels for a flag capture. In the end, I stopped playing - it seemed there was no one left to best. In my time in Tribes I met people who's own particular brand of skills were fearsome in their own right. From a highschool friend who went by the handle Grindspo0n who mastered the methodical juggernaught called the cyborg to a guy named Bars whom I never met (spelled |||||) but remained the only person who I truly feared when I met him outdoors with a vulcan.
The only other game where I achieved any notable level of skill was the game Mechwarrior 4, and the expansion packs. I was rarely a stellar player on any team - I could be counted to cause more damage than I sustained in almost any scenario but that was hardly a notable feat. Instead, I loved to tinker with the machines themselves - trying to produce a design supremely suited to engagements of the day. In an age where the 7 ER Large laser Nova Cat was the standard by which all other mechs were judged I took the field in a Timber Wolf, packing unusual speed and moderate extended range firepower. Sure, I had 3 fewer large lasers to bring to a fight - the fact that I could dictate range and fight beyond the range of my opponents for much of a battle was enough to gain an advantage. And when people did force their way into close range they found that unlike most missile boats my mech had copious supplies of armor and 4 lasers held in reserve. When most people took to the city battles using Dire Wolves loaded down with heavy autocannon, I brought a Highlander sporting much longer ranged fair (Heavy Gauss rifle, UAC10 and 3 Large Lasers). Sure, my alpha strike was lower than most but again the tactical flexiblity offered by these long ranged (for cities) weapons meant by the time someone struggled into range to bring their death cannons to bear I had already worn their defenses to little more than paper. Careful cycling of the weapons also had it's upside: I could keep the enemy off balance by constantly diverting their aim with well timed volleys.
The only game of the three that I miss playing though is Mechwarrior. It seems like there is so much more that can be done with the franchise, but with the demise of FASA and then WizKids I don't hold out much hope for another Mechwarrior game.