I guess life wouldnīt be very different. Mankind hasnīt much evolved in the last ten thousand years. That what we call civilization and culture, that is just knowledge passed on. Nothing special.
Well, I know pretty much about agriculture and botany. I know which plants are useful and I even know how to build a well. Maybe I would share my knowledge with other people but most likely I would just become an hermit.
"Good evening, gentlemen! Please pay attention. I am a reformed vampire, which is to say, I am a bundle of suppressed instincts held together with spit and coffee. It would be wrong to say that violent, tearing carnage does not come easily to me. It's not tearing your throats out that doesn't come easily to me. Please don't make it any harder."
~Maladict, Monstrous Regiment