I have to wholeheartedly DISAGREE with Bullados.
If you accept players inherently having aspects of the game they accelerate at, that is accepting having weaknesses and flaws.
I consider myself better at using set up decks than disruption or speed decks. Not because I cannot play them, but simply because I devote more time to them as more often than not, I feel they are the superior choices in a given format. This format, I have played AMU and Kingdra, both with heavy emphasis on disruption, because I recognized they are the best decks. ( Well, AMU was before SF )
If I let myself get pidgeonholed by what I'm "supposed" to use, I am 70%+ of the time playing less than the best decks. Anyone who is good can play any style of deck perfectly fine. They just may need to play a few games as the deck to get it down. A GOOD player might need to focus on a play style they are very used to, but a GREAT player can pick up a deck, and be proficient with it regardless of its list within 5 games.
Taking Bullados's advice will actually inhibit your ability to grow in the game.
It is useful to identify your weaknesses, but only pay attention to that so you can work on eliminating them.
For example, Bullados references energy acceleration. There are effectively no real viable decks using that approach. The top decks are Kingdra, Dusknoir, Obamasnow, Regigigas, Machamp...roughly in that order. Unless you count Gigas ( which is a lose extrapolation at best of the concept ) none of those are energy accelerated decks. By sticking to your self classifications, your forcing yourself into a tier 2 deck at best.
Last format was EXTREMELY bad for speed decks, for example. Scramble Energy made things brutal for them. GG, and Empoleon ruined them. If you consider yourself a better speed player than anything else, and stuck to your guns, not only did you have a terrible, terrible season, but you also gained little to no growth as a player.
If anything, identify your strengths...don't play them. Play what your worst with, until your get better. You become a more complete, well rounded player. Growth isn't quick, it takes time, don't try to take shortcuts.