I consider myself a hardcore gamer. But I play mainly RPGs (love me some retro JRPG goodness), TBSs, the occasional fighting game and a whole bunch of SNES-era stuff. Also stuff like Mario and Zelda, and those are to violence what cupcakes are to a whole roast bison you killed with your teeth. Not really into FPSs and so on, mainly because I can't quite get my head around the first-person side of things and also because my reaction times with those controls are not that hot.
Games I consider to be not hardcore are easy or casual or both. Picross, Animal Crossing, Professor Layton, Wii Sports. But even then the distinction seems kinda silly. It seems to me like the games which you're referring to as being "hardcore" are not so much "hardcore" (or well, they might be, but they don't define the category) as "bro" games. Like, the kinds of games your regular, popular fella can play without other regular, popular fellas going "dude you're such a nerd!" Instead, they play the game, and then they bump chests. Or... something?
Go figure!
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The past, the present and the future walked into a bar.
...
It was tense.