Well, your website can be about anything as long as it's not warez, porno etc. (like I need to say that to you) but just being thorough in case anyone 'else' is watching.
Heck, you could have your link to your kid's photos etc. It's just a 'personal' bit is all.
Mine happens to be graphics because now that's what I'm solely 'into' but I once had a totally goofy homepage. hehe!