what kind of bike does /n/ recommend for using as a primary mode of transport? I have been using my dad's old mountain bike for moving around. Are mountain bikes good for this, or are they really just meant for mountain trails/going off the path, because I just plan on using it for getting around in my rather suburban community (which does have a few hills, which is why I ask).

Picture related, it is my bike. Shitty image is shitty because I only have a cell camera to work with.