I've never played any of the Elder Scrolls games but I like fantasy, open worlds and rpgs so I might get this. Maybe I'll even get Oblivion too. The only thing I find off putting about these games is the amount of time to complete. I hear it takes several hundred hours to do everything in these games and I just don't have that kind of time. I'm a completionist who likes to complete every single quest. I consider 50+ hours to be ideal for an rpg (ME2, DA2) and am happy with 20+ (FC2, KOTOR 1 & 2).
Then again, I did spend 100 hours on AC:B doing mostly nothing so maybe I do have that kind of time to waste.