The main reason why I don't play my Wii-U at all

[domflo]

I think such a system is completely unnecessary. I understand the appeal of such achievements, however.
Of course, because of these achievements, some people might do certain stuff they never would without getting one for it. I don't really think that that's a good way of "enhancing" the game. If I like a game (meaning: If I deem it good), then I will go for completion anyway. I did everything there was to do in Super Paper Mario (collected all the cards, all cooking reciepts, did all sidequests) an am currently trying to reach the level cap (just out of enjoyment). I played through Fire Emblem: Awakening multiple times and I am on my way to unlock each and every support conversation in the game. Of course, this is kind of an achievement in itself, but I get something for it that actually means something for me instead of an virtual trophy with no use whatsoever.
If I don't like a game, I won't try to get the "acheivements". I have a few PlayStation 3/Vita games that have trophies, but the only one that I might get a platinum on is Persona 4 Golden, because it is the only achievement compatible game that I want to 100% anyway.

So really, achievements don't motivate me to play a game thoroughly, it is (and imo should be) the game itself that motivates me to do so. The only achievements I like are ingame achievements (not the Uncharted: Golden Abyss or Sonic The Hedgehog 2006 [Medals!!1] kind), like the systems used in Super Smash Bros. Brawl and to an extend Kid Icarus Uprising, where you actually get new music tracks to listen to or new other stuff if you do certain things. But even then, I could live without that.

Oh, and the biggest problem I have regarding the Playstation achivement system (dunno about the Xbox) is the fact that some games give out trophies like it's their business, while some others make you do all kinds of crazy/hard things to even get one. Best example: MegaMan 10 awards you a silver trophy for completing the game without getting hit, while Assassin's Creed Liberation gives out silver trophies for story progression. That's stupid. Or Persona 4 Arenas "Tune In" bronze trophy, that requires nothing more than pushing start on the title screen. Why should I get a trophy for that?