My hubby got snipped when our daughter was about 2. The only complications he had was thinking he knew more then the Dr. and not following the advice to lay around for the day with ice packs.
He swelled up like crazy and ever since, if a Dr. tells him to take it easy, he does, LOL.
Other than that, it was a non-issue. Just take samples to the lab for testing for about 6 months.
I'm like you... I was adamant to not have another child. I was once and done. I continued birth control until I had to have a hysterectomy about 10 yrs ago. That was the best thing I did and I have not felt better, freer and higher sex drive because I know I can not have an oopsie.