I love collecting original art. There's no right way or wrong way to start a collection - you just buy what you like and display it proudly. Bare walls stress me out. I see them as a place to hang a painting. Or a print. Or a poster. Whatever you like, I'm not picky.
Z.Gallerie has some great and funky wall art that is priced pretty well. Check out these two super cool x-rays of seagrass:
$249.99 each at Z.Gallerie.