I made this little chart to see what focal lengths I use and I discovered some interesting facts.
I use my 50mm a lot. That makes sense. Wonderful lens it is.
10-17 is all fisheye. I get some milage from it, too, considering that it is a specialty lens.
I use 18 quite a bit. Probably more often when I first started taking photos. This big bar makes me more interested in the DA 21 ltd. If I'm going to spend a lot of time at 18-ish, it might as well be with a prime.
I recently bought the 50-135. Too recent to make an impact on this graph.