Absolutely, it took me a while to get into Halo. Plus, it took me a while to get good enough in it to actually enjoy it. (For some stubborn reason, I refused to play at the easiest level. I don't know why.)
I chose Alan Wake, but could have probably like the the Uncharted series in its absence.
It was more about the controller and, believe it or not, the community. There are many games that you play on both, so it was more about what you can do on each system that did it for me.
I like the crazy indy games on the Xbox too, it's a great bonus.
Probably the final nail that convinced me that I made the right decision, was the mistakes on the PS3 super slim, and when they added voice commands through Kinect on Skyrim. When the other system was still struggling with the game.
I would still be interested in Nintendo, but they seem to be working to push me away from their system with what they have been doing and not doing.