Typically, I go back and forth between Aveeno's shave gel for sensitive skin and Barbasol, but I have a can of Proraso in the mail and on the way, and I plan to start trying out different soaps. I prefer to change only one variable at a time (to ensure I know what does what), and since I have been fighting some pretty wicked acne for the last two years (no issues through teen years, and then BAM), my options are limited with face products. It has been slowly clearing up, though.
Rich
Edit: Before trying out a lot of different products, I wanted to get comfortable with the razor and brush using what I know already.
Edit: Just a side note: I also tried Dr. Carver's Easy Shave Butter (non-lather), and while I love it with a two-blade cartridge, I gave it to my girlfriend because I didn't care for the results with a straight razor.