Any surgical procedure has a risk for bleeding or infection. Vasectomy is very low risk in these regards. There is something specific to vasectomy called the post-vasectomy pain syndrome that is rare, occurring in fewer than 1 in 4,000 patients. Symptoms generally resolve on their own. It is described as a dull, aching sensation in one or both testes that develops within a month or so after the procedure. Finally, there is a very low risk for birth control failure once your semen analysis shows no sperm.
Vasectomy will not negatively impact your sex life. It does not impair your ability to get or maintain erections. It does not impair your sex drive nor your orgasmic experience. Your erectile and ejaculatory function will not change, although there will be no sperm in the ejaculate.