I don't really hate consoles but here are a few reasons why I've yet to purchase a Wii;
1: Price, the console has had few price cuts and offers little value for money, especially peripherals and gear costs way too much and the games almost never get cheap. PS Platinum titles and X-box Greatest Hits are a good way of increasing your game collection without going broke. There is no justification for pricing your games near new, years after release (don't give me the "but Nintendo games are worth it", its stupid, plain and simple). This goes double for titles that sell in the range of 10-20 million. Yes, I know Nintendo, unlike MS and Sony, live solely off of gaming but this is beyond silly to me.
2: Functionality. The Wii simply plays games, which is fine since its a games console. But the other consoles offer so much more, this somewhat ties in with point 1 though.
3: Good games outside of Nintendo titles; there's no getting around this one. Not one person can, hand on heart, claim that the Wii has a stunning library of good titles outside of first party. Are third parties to blame? Well, they made a decision, as did Nintendo, they're both to blame imo. Are there good games besides Ninty titles? Yes. Are there enough of them to warrant a purchase? No, not in my opinion.
4: Tech and weak online. Nintendo chose to forego almost all semblance of online components and horsepower, citing (yes, this is real) "it isn't important yet" (the online bit). Even though I don't play console games online, there's still something to be said for companies refusing to stick with the times. Friend codes are the devil's work.
5: Controls. This is kind of a big one for me. Its no secret that I'm not a fan of motion controls but the real kicker is this; there are almost no Wii games that make use of the Wii-mote properly or intuitively, its just waggle or they play a lot better with a Gamecube controller. Wii Motion Plus is fine but it costs a lot here and its too little too late imo.
6: Consoles as a whole have grown and stale and boring for me. This is why I haven't bought a single console game is nearly a year and probably bought over fifty PC titles in the same timespan. Not a point directly against the Wii ,it goes for all three. I'm hoping next gen will be better but I doubt it.