Jumping spiders make for great pets. Watching them hunt is fascinating, they'll crawl all over anything you put in the terrarium, and they can go without food for weeks at a time. Very low maintenance. And they're usually comfortable with climbing into your palm. I don't do it, because I worry about injuring or stressing them, but my wife loves it. We've never been bitten by a jumping spider.

If you don't like the idea of catching and caging spiders, keep one by a window. The small amount of webbing they leave isn't prominent, unless they have trouble climbing (like in glass terrariums).

Sadly they aren't wild here in the UK, but I've read a lot about them and enjoy the local spiders we get here. Spiders and octopus definitely would be ruling the world if they wanted to.