How about a house snake? Not a real pretty snake, but it has its own particular kind of beauty. The irridecence on this species is pretty impressive too.
They're a great beginner snake I think. Very docile (just don't grab em behind the head). Maybe not incredibly active, but then again, the majority of snakes will spend alot of time hiding. Easy to feed and keep.
And cheap cheap cheap. I bought mine at a show for $15 as a hatchling. She's now about as thick as my thumb and about 2.5 feet long. She typically eats 1 adult f/t mouse every week to 10 days.