In Oblivion, being blood starved vampire was amazing. You got tremendous boosts to multiple stats. However, one step into sunlight equaled instant death. In Skyrim, being a blood starved vampire is also very cool. And you can step out into the sunlight, which is fantastic. But, there is one downside. One major downside, you can't even ENTER towns or villages without being chased off. I'm okay with the being a monster aspect, but i don't think you should be chased out so quickly. My idea is that you're only noticed when you get really close to someone, or you talk to someone. Being for people to know what you are right off the bat is a bit silly.
On a side note, werewolves. I would like to see a first person point of view for them. Although 3rd person is fine, as i play in 3rd person just as much as i do in 1st, sometimes playing as a werewolf in a tiny space makes for a difficult time. And i'm not going to lie, seeing a closeup of those wicked claws would be pretty darn cool!
Please look at my forum suggesting more ideas for the future Skyrim. It's worth a read!
http://www.gamesas.com/topic/1374985-major-ideas-for-next-patch-read-this-bethesda/