Vampirism Options

[Parkillous]

Ok heres the deal: just completed information for a price mages guild quest, went to sleep at chorrol mages guild for 24 hours at about 12 hrs its cuts off i get the usual lvl up thing then it sais a gaunt figure came in yadda yadda bit ya ur a vampire gives u skills etc...reloaded, slept in dif bed to test for same time and it happened, then slept in same bed for 8 hours and it didnt happen..

well im wonderin if i decide to stay a vampire do i have to avoid the sun and/or bite necks... is there anyway of undoing it or am i permenantly a vampire, and in your general opinion are the perks and negatives worth staying as a vampire etc???????????