I have a single speed that I keep as simple as possible. Single speed, no derailers or ****ers. just one gear and brakes. No computer, although I sometimes will mount my iPhone to it, if I want to know the distance of a specific ride. It's fun to ride. My other bikes have 'puters, but I don't really track mileage. I'll reset them at the begining of a ride, look at them at the end, sometimes as a guage of my fitness level if I have a big ride in the future, but usually I look at it say 'That's nice' and go on to the next thing.
You want to ride with all the stuff, fine with me. You want to ride simple, that's ok with me too. I'm sure we'll have something in common at the coffee stop.

Enjoy the ride!