I'm totally not against Co - Op, under the good circumstances it can be amazing. If you're both terrible at the game, then you can both stumble through together, laughing all the while. The danger lies when the player skill is out of sync, in other words, your great and he/she is just plain poor.

When I'm playing with friends, which is hardly ever, but when I do I prefer competitive play, because it's friendly rivalry, not begrudgingly assisting your friend. The RE series unfortunately doesn't lend itself well to this. It's for this reason that the Mario Kart games are the best selling racing games, and my personal favourite, it's just wacky fun with friends.