I'm the Jack of All Trades, which leaves me in an all round better position than most of my friends as we play all sorts of different games, and I am always consistently high scoring in each of them - though not the best [Note: High scoring relative to the median. In some games like Guitar Hero, there is one of my friends who absolutely dominates and will have 4 times my score at the end, whilst I'm at 3 or 4 times everyone else's score's when they played the song].
One of my friends is the best at RTS and FPS. In RTS he will consistently kick my ass, though I can stand against him fairly well, he just ends up winning through attrition and map control. FPS we're about equal on, though he's got a definite advantage on consoles as I never use them, and on PC the average result is him winning by a couple of points, though that's not always the case. He's also pretty pro at RPGs having grown up with his dad playing D&D at least once a week, whilst I've only had CRPG experience over the last 6 years. At the same time, he sucks at Guitar Hero, fails at 4X games, is meh at action RPGs and fighting games and really where he's good at is basically just RTS, FPS and RPGs. Oh, and MOBAs. He will 1v5 the rest of the group and win. We know his strategy, we just can't execute it as effectively thanks to gold and XP share, and we don't work well enough as a team whilst he goes for an agility based character with high stun chance. We all end up permastunned by the time he reaches level 5 Q.Q.
Another of my friends is only good at fighting games. He will dominate the rest of our group without getting hit once [Except when we get to our second matches against him and I figure out what the easiest combo to use is >.>] in most PC or arcade based fighting games. Move to any other game type and he's laughably bad though. He is the epitome of failure in everything but fighting games, and is consistently last every time. Doesn't stop him being a trolling pain in the ass in those games though, and it leads to a lot of funny moments we all look back on fondly.
Another of my friends is good at racing games and Guitar hero, but meh at everything else. He's passable at FPS and fighting games, but head into RTS, 4X, RPG or other such games and he's screwed. His skills revolve around fast finger movements and twitch reactions, and you get into something with strategy in it and he's got nothing.
Another of my friends is a Jack of All Trades like me, but not very good at most games. On the flipside he is the best healer anyone in my friend group has ever played with. He'll know your on low health and will have healed you before the game even gives you a warning, or will have revived you before you realise you're dead. He seems to have an unlimited energy pool, and is often the only one keeping us from a total team wipe.
And then there's another Jack of All Trades who specialises in nothing, but takes things too calmly and slowly to be good at anything. He can be alright at MOBAs and RPGs thanks to having time to plan a little in advance, and being able to react quickly if hes prepared, but otherwise meh.
Me, I'm the Jack of All Trades who is consistently second or third no matter the genre, and occasionally first dependent on the game, genre and who's playing at the time. Me and the friend who's good at RTS, FPS, RPGs and MOBAs are generally considered the best gamers in our group. Put us on a team and we're unbeatable, especially if we get the healer.
