..yeah, there are opinions, and then there are just facts, trying to say whitney houstans version of i will always love you is bad is like trying to say billie jean isn't an amazing song. it's just a wrong fact.
I think http://pbskids.org/arthur/games/factsopinions/factsopinions.html might help you.
Personally, I never really enjoyed anything I can remember by her. As much as I'd love to be sympathetic, the evidence leaning towards a drug-fueled death can't be ignored. Then again, I can't say I'd really feel bad if any famous person I knew passed away, whether natural causes or otherwise. I don't know them personally, so any feelings I'd have wouldn't really be warranted.