IPlot is honestly quite dumb, there's parts of it I and most like (Jake and Sherry are actually kind of likable characters, Chris and Piers story arc is kind of interesting), but a lot of the other stuff is either dumb, not very important, or just is kind of there. Was one of the game's weaker areas, in my opinion.
RE6 has great characters and relationship between them. The whole story though... it's really the weakest aspect of the game. It's especially hilarious when you realize the whole thing ultimately started with an unresolved sexual tension. :lol