I tend to stick with games that have the least amount of flaws that bug me. That is why I play 06 more than any other game. I think gamers should find the game that bugs them the least. 06 is mine.
Having said all of that, 07-11 have very similar features that make those games hard for me to enjoy, momentum meter and jump the snap to name a few. However, the biggest issue 10 & 11 have (besides literally being the same game) is recruiting. Most 5 stars are either QB and WR. This means that you'll rarely find elite talent at any other position. This was lazy on EA's part and I don't know why they done this. They also didn't even bother to change names on first year prospects. Stuff like this is enough for me not to bother. The other issues I mentioned are icing on a bad-tasting cake.
Each game has its own issues, even 06. I wish I could just ignore certain flaws but some keep me from enjoying these games.
Make sure you check out my blog and YouTube channel as I cover 06 more than any other game. However, I have a ton of useful content on other games too. Click on "FILES" in the main menu to access most of it.