Hmm, lets start from Generation 7 only
360
- I was wrong in believing that it would not reach the heights that it did, due to various hardware complications.
- I was wrong in believing that it was worse suited for third party games than the PS3. In a lot of cases 360 version played much better.
- I was wrong in my perception of FPS, and FPS on consoles being capable of such quality.
- I was wrong that I would hate the 360 controller
PS3
- I was wrong in believing that this would be runaway hit from the start, even with the bad publicity, I assumed everyone would just get one.
- I was wrong that Sony could not turn it around, and they did.
- I was wrong that Sony could not build first party games that rival the best publishers
Wii
- I was wrong that Nintendo would just do meh.
- I was wrong that Nintendo could gain third party titles if it simply did well
- I was wrong that I would hate the controller, but it ended up being one of my favorites overtime
DS
- You know what, I cannot think of something for you. Lets say I doubted you could reach 150 million, and I was wrong about that.
PSP
- Same as above, I guess again sales, in fact sales for all five, I was heavily wrong about that all five could sell well at one point or another.