The one thing that pissed me off about Riven was how often I had to change disks when I went to different islands/world. The family computer was rather old and it took a while to coax the compy tower to spit open one disk to insert the other. Then I'd put it in and it'd be all like "Sigh. Now that I did that one little thing I have to go back to the other island." and spend another five to ten minutes getting the other CD in.

*looks about on Wikipedia* Hey! They got up to a fifth game!

*adds to my list of things to do after I graduate*