For personal projects where usually not (really) busy in traffic, instead of paid Subversion (SVN) service, free service (of course) are economically efficient. I’ve been used few services but finally I stay with one.
I currently with RiouxSVN, free SVN service. although it has some limitations regarding repository number and space, you can extend them by give them some small donations. What I mostly love about RiouxSVN is, it really simple and free of distraction, well you should try it in your next project.