For me the thing that I like about contact printing is removing all the abstraction from creating a photograph. You compose your image right on the groundglass exactly as you want it to be in your print. When you develop your negative (by inspection of course), you are watching the tonal scale expand right before your eyes (no time and temperature, thank you). And finally the ease of making the final contact print lets you devote more of your time to photographing instead of perfecting enlarging techniques.
In this age of vinyl siding and digital unreality I view my camera (no pun intended) as a bulls__ cannon, a weapon used to cut through the layers of abstraction that engulf us in the modern world.
Also I enjoy it because it is fun.