HoosierMommy, I've got to admit my own MIL drove me crazy when my kids were little, OK, she still drives me crazy, but now I blow it off as we're really different people. The worst was when my children were small and she'd always say she wanted to watch the kids. I was a SAHM, so I never needed her much but EVERY TIME I needed her she'd always hem and haw around like it was a huge imposition! It drove me CRAZY, but I think I already said that, haha!
Anyway, I did my best to get past that and the relationship between my kids and their grandma made it worthwhile for me to bite my tongue. And now we even can share a few things like the symphony and ballet a couple times a year.
It's odd, her own MIL helped raise her kids, but she just wasn't the kind to be able to help with her grandkids on any regular basis.