Hi Julian. My personal opinion is that the two types of guitars, acoustic & electric, are far enough a part in sound and feel that they are really to different instruments. There are really no rules, but in general for rock type playing, such as using an amp and overdrive sound to play power chords, solos, etc, people tend to use electric guitars. For folk music, ballads, fingerpicking style or just really nice sounding rhythm people tend to use acoustic guitars. But again, this is just a generalization, as there are plenty of people who go against "the norm". I'd just suggest that you develop both, and switch instruments at your own preference. If you like the way something sounds on one type of guitar, go with. If you find it infinitely easier to play something on another, then that's fine. This way you'll develop your own style. Lisa McCormicks acoustic lessons on this site are awesome.