I don't know much either, and like @fighter I'm not that interested in exploring her catalogue, but I do like 4 songs a lot: Turn Back Time, Shoop Shoop Song, Dark Lady & Dead Ringer For Love with Meatloaf :-)
I hate believe. but i like some of her classic songs that ive heard like bang bang, gypsies tramps and thieves, half breed, and i like her performances with teenta turnter