If you like working on things, and tweaking things constantly, get nitro.

If you like having something that you plug a battery in and go, get electric.

I prefer nitro personally, because I like working on things, and the sound and smell are a great bonus. If someone else can hear it, they are going to be more cautious, where as with electric if someone else is around and doesn't know you are, your basher could quickly turn into a paperweight.