Leica M (240), Lexar SD cards, Ona Prince Street (Dark Truffle), Think Tank Photo SD Pixel Pocket Rocket
As you can tell I'm a big fan of Lexar memory cards. Once I find something that is reliable it's added to my workflow until it lets me down. Lexar cards have been my go to memory cards on both my Leica and Nikons. Just buying whatever is on sale doesn't work for me. The images I create define me and are too important for a Costco mentality.
Large capacity memory cards may be convient but I have always preferred smaller cards so that if they ever fail, well there are fewer images to loose. 32 GB cards on the Leica M seems to be about the perfect size for me.
When I teach workshops on street photography I hand out a Lexar card with some images on it so that the students have images that are standardized so when we do the Photoshop or Capture One Pro training everyone has the same images to work on. Yes I go through a lot of Lexar cards.