In retrospect, I regretted not having my Zeiss 35mm f/2 along. I love my Canon gear, but my days of dragging big lenses and heavy DSLR's along on vacation are over.
I actually like the way Zeiss and Leica lenses render over Canon and then throw in the size difference. With Leica being my preference. The 90 cron APO and the 35 Lux FLE are very special. Now if I only had 13K laying around the 75 1.25 has a wonderful 3D look wide open.