First time was wonderful because it was the first time for both my gf and I. We were only 14 - a bit young really. She smelled really good and felt really good and I came ever so quickly. It didn't matter though. We didn't have much in the way of expectations. Now that I come to think of it, I guess that is one of the advantages of losing your virginity when you're young. Older people have more time to build up their expectations, and I guess there are pressures and anxieties that go with those expectations. Anxiety is the biggest passion killer.
But to answer your question: It was very exciting the first time, and of course it was a special occasion. However, I have had much better sex since. (I sincerely hope the girl has had better too: I'm sure she didn't have an orgasm!)
I don't think I started to have really good sex until I was in my mid 30s and had finally got over my premature ejaculation problem. Once that happened I discovered I could almost always give a woman an orgasm during intercourse - THEN I realised I was having good sex!

It got back to me that I was being described as a really good lover. That was success to build upon.

Probably the best sex I ever had was with the woman who eventually became my wife. Isn't that nice?