I am in the habit of smiling, getting up, doing a little "sack dance", and taking a brief break. I also tend to make a Tim Tool-Man Allen "Huh huh huh" grunting noise.
Then I try to explain to my husband what I just did that was great and, since he's not so technical (I was trying to persuade him last night that a number is the same whether it's written in hex, octal, decimal, or binary.), that normally brings me down to earth and reminds me that my victory is just an obscure little accomplishment that really doesn't matter in the grand scheme of things.
Gee, that doesn't sound that great.
I have noticed, like others here, that my code tends to grow as I'm developing, then shrink as I improve the design. There is a pleasure that comes with removing code while it improves. Elegance is something I rarely achieve, but it sure feels good when I do.