Great thread, I thought I'd add my thoughts. I purchased a Flex 2.8 only two weeks ago and whilst it takes a little getting used to, I really like it. I know I have more to learn and practice will get me there. I am still adjusting to the leveling, the reverse image and the external metering. With my first roll of film i shot some handheld and some on tripod. I enjoyed slowing down, getting the exposure right and checking all bases before shooting.
I shot on transparency and most exposures were fine, some not so, but it amazed me how much detail a scan of an underexposed tranny can reveal. I am thinking of shooting something like Portra for a while and it may allow me to work a little more freely with the camera. But I like knowing whether my exposure is spot on as it helps my confidence in metering. I come from a mostly 35mm background too.
When I saw the quality of the images on Flickr I had to buy myself one. I have a 2.8 Planer and the way it works with the light is very attractive. I looked at lots of different systems and whilst this will take some time to master I know it's worth the effort.