Here’s my small definition of what a gamer is.
A gamer is someone who likes videogames, and likes playing videogames.
There are different types and categories of gamers, and each group of gamers, have their own style and preferences too.
Like for example, 3d fighting games:
Some gamers, like basic 3d fighting games, that are unrealistically simple, with a more basic, barebones, arcadey, overexaggerated juggle heavy combat system, with a not so deep combat system with odd fundamentals, and with alot of movement restrictions, like Tekken.
Other gamers, don’t like basic level fighting games like tekken, and find the game not fun. But would rather play, and spend their time, playing more advanced, closer to realistic, super advanced, deep combat fighting games, with lots of combat mechanics, like Virtua Fighter.
And other gamers, like super fast, kinda over exaggerated, hyper fast combat fighting games, with lots of young babes, hot young dudes, and jiggly jiggle physics, like Dead or Alive.
And then there are others, who like 3d fighting games, where people fight with magic swords and weapons, like Soul Calibur, and another one, called Plasma Sword: Nightmare of Bilstein aka Star Gladiator.
And others, don’t like 3d fighting games at all, but would rather play 2d fighting games instead. Like King of Fighters, Street Fighter, Guilty Gear, Blaze Blue, Fighters History etc.
Note: There are many categories of gamers, who like fighting games. And there are many categories of gamers, who like other game genres as well. But there are too many for me write.