I think that when you first start burning that it's very useful to verify. It gives you confidence that all is going well.
I used to when I first started & found that some of my burns didn't verify. This was largely down to the poor media I was using. Once I go some decent media the verifications always worked, so now I don't bother with this anymore.
I do , however, disc quality scan all my video burns to ensure that I've managed to achieved a certain standard.