Sometimes a game comes along where where you recognize its flaws yet enjoy it regardless.
For me it's Silent Hill: Homecoming and Final Fantasy XIII-2.
Neither refine the tone or purpose of its predecessors, yet I love them anyway. Many Tales of games fall under this too, as I forgive obvious flaws in light of positives.
Tell me some of yours and I may just buy them and add to the sequel possibility! Hidden agenda revealed!