I find the show amusing, but nothing special at the same time. I love 17th,18th century pirate era and that's the only reason I watch it. I would love if HBO would made a pirate series, that would be historically accurate and "game-of-thronish".
just finished season 1 last night and I'm looking forward to season 2. While it wasn't fantastic (IMO), it was pretty interesting and at times actually had me curious as to what they would do next. I think Vane is the most interesting character on the show (also Eleanor..). I'm not watching it for any sort of historical accuracy, if I want to get that I'll read a book.
Rome is the best historical show ever, it respected its subject mostly and I felt every actor suited their role. The Tudors and The Borgias started out nice but soon felt like costumed soft porn. I think The Tudors started to give their female audience more attention because there was a lot of boring scheming type of stuff.
I won't even watch Spartacus or Black Sails since I've seen the trailers, does not seem to respect their subjects.