When I first heard that Android was based on Linux, I thought, "Great! I'll be able to use my phone the way I use my desktop, with shell scripts, cron tasks, etc."
The reality was quite a disappointment. I suppose I could do at least some of the things I'd like to do with it if I rooted it, but I don't want to become a full-on hobbyist; I just want to do basic things that I routinely do in seconds on a normal PC.