I have a hybrid bike. A bit like a mountain bike, but with full mudguards, front shocks, 24 speed, carriers front and rear, and butterfly bars. I also hand painted it, so that it is really not that attractive to thieves. Hand-painted, harder to fence, and harder to sell second hand. I also keep it dirty, except for the working parts, a thief will probably be too lazy to clean it, unless it is super valuable.
If I were buying a new bike, something I would look for is the LED lights built into the frame. That way you never have to carry lights around and they are always there when you need them.