I luffs my MIL too. She thinks (and has told me) that I am "the best thing that ever happened to DH". So, how could I not.
She is also intelligent, thoughtful, loving, generous, gives us buckets of free childcare and generally spoils DDs rotten in helpful ways, like going to their school plays rather than 20 tonnes of Christmas presents (although she does give about 10 tonnes of birthday present...)
She also had an excellent relationship with her MIL. Even after the divorce. She and I joke that she must be the only person to go to her ex-MIL's funeral other than to check that the ex-MIL was really dead! 