The Wii not being DVD capable, and the friend codes. The friend codes take everything that is cool about online gaming, puts it in a bag, and beats it to death with a hammer.
The PS3 not being backward compatible, or at least the one that I own. I bought this actually thinking that I was going to be able to go out and buy all the PS1 and PS2 games that I used to love and play them. Well that didn't work out too well.
My biggest disappointment this gen is the RROD. I would have had a 360. Period. If not for the RROD. I am a big value kind of guy and you can't get more value than a 360. BUT, I am an even bigger reliability guy and I couldn't take the plunge knowing that I would someday possibly be looking at a RROD issue.

Acti-Blizzard
My impressions of Starcraft II from what I have currently seen (I was so hyped)
No Eternal Darkness (yet)

1) Wii - didnt enjoy any games as much as i did with the one it came with

2) Xbox360 - RROD...nuff said

3) PS3 - Discontinue B/C. It was one of PS3's best feature aside from being the best Blu-ray player

1) I'm missing B/C as well.

2) DLC, especially if it's exlusive to one console.

3) Grand Theft Auto IV (I know a lot of people have another opinion.)

1. Lack of quality JRPGs on all platforms
2. 3rd party Wii quality
2. No BC on PS3 (although it made me buy a 360, which I love)

1. Delays
2. Stupid delays
3. F-ING DELAYS

It's funny that I knew coming in that half the people's top three would be the Wii. People like to bash the Wii and if they give a reason, it is usually "graphics suck".

1.) DLC and the abuse of it.
Console games AREN'T suppose to be shipped incomplete and then PATCHED later...Thats what I PC game for! =D

2.) Elitist.
You play games to have fun, not to look for flaws...

3.) RROD, and Sony cutting B/C to save cost.
It was what I loved bout my PS2 I could play my PS 1 games. My orginal XBOX was a solid machine, rushing to be first didn't do anything for MS but create a problem.

Since when the Cell was supposed to be 1 TFLOPS? As far as I know, 1TFLOPS was what MS to be X360's power. Oh well, whatever...

1 - GTA IV

2 - Too Human

3 - Haze

1. No great console JRPG's yet........(shoot, jrpgs are practically the only thing I played the last two gens and they're really the only games that keep me constantly happy)
2.Wii (mainly SSBB)
3.Excessive DLC. Seriously, just put everything into the frickin' game instead of tempting us to buy extra stuff to enjoy the game to it's fullest. (I'm looking at you ES4, $30.00 for an expansion? 0_o)