Meh, personally couldn't care less how hard or easy it is as long as it's fun.
I enjoyed the heck out of games like Mario Galaxy or Kirby and the Forgotten Land that I found quite easy, and games like Donkey Kong Country Returns/Tropical Freeze which I found quite challenging.
For me, a game's quality rests on how good it feels to control, how creative and enjoyable the level design is, stuff like that, rather than how easy/hard it is.