You've read Sharon Kay Penman's big ole historicals, yes? And Philippa Gregory (who frankly I don't care for as much as Penman)?
I concentrated on Tudor for the longest time, and only fairly recently branched out on either side chronologically. Eleanor of Aquitaine fascinates me, as does Marie Antoinette - and let's not even get into those wacky Plantagenets!
I really don't like Phillipa Gregory....her endings are SO depressing (at least the books I read).
Elenor of Aquitaine is one of my favorites, and Marie Antionette simply because she's a "hometown" girl. And feel for and like reading about characters like Lady Jane Grey, Mary Queen of Scotts (and her poor dog!)
Barbara Tuchman is probably one of my favorite authors....A Distant Mirror I still pull out and read every so often.
And yes, for a few years, I hung out on Alt.royals