I started "one of those" MIL threads, but I tried to make it clear that she's a wonderful person and we have a great relationship. Same goes for my mom, DH, and all my other family and friends, but of course we still butt heads every once in a while -- I don't know of any close, loving relationship where that doesn't happen occasionally.
I hesitated to use the term "MIL" in my thread because it carries a certain connotation, and I thought that many people would brush off what I had to say because it may be seen as just another stereotypical MIL thread. But the generic "family member" got too cumbersome, so I switched it to MIL to be more concise.
Anyway, yes, my MIL is awesome and I hit the jackpot with my DH's whole family -- they're warm, caring, thoughtful, involved people who love me and our kids a great deal, as I do them. I couldn't ask for a better family. And at the same time, they drive me crazy every once in a while, just like my family does, and just like I probably do for them.