Back in the day, it boil down to this

1. Do my friends have the 360 or the PS3? (So you can play multiplayer with them)

2. Which console exclusive games do I like the most?

I do not have my PS3 anymore, but I still have my 360. I always preferred my 360 over my PS3 because I had more games and friends. There were very few PS3 exclusive titles that I wanted to play. Although, I loved the backwards compatibility of my PS3, it was not enough to make it my favorite.

PS3:
Pros,
-Better exclusives than Xbox

This isn't objective

-Better downloadable games

Neither is this

-Better controller for everything but shooters

This isn't objective either

-Graphics were generally better than the 360

This is actually wrong, at least for the earlier years, because the CELL architecture that the PS3 uses is fucking retarded and a nightmare to work with.
The PS3 did have the better looking exclusives (TLoU, UC3, that shit David Cage game with Ellen Page etc etc) near the end of its lifespan though, but multiplatform games generally ran better and sometimes looked better on the 360 because it was the easier platform for 3rd party devs to develop for.

I liked the 360 controller more for racing games tbh

Only use for fighters if you want bruised thumbs though

Personally I got a lot more out of the 360 than I did the PS3. That may be due to my taste in games though. Nothing can, in my heart, compete with Halo 3.

agreed