I collect and shoot film cameras. I'm definitely not a professional, but I enjoy the history and engineering of these devices, and think it's a shame to collect them without running a roll of film through them.
Typically, I shoot black and white negative film and process it in a Caffenol developer. Caffenol is wonderful because it allows me to keep a relatively minimal stock of lab chemicals and is a non-toxic way of developing black and white film. See the Caffenol Website for recipes and more information on this process. Sometimes, as you'll see in the photos section, I will splurge and shoot some color film, which I have always had processed by a lab. Scans are made with an Epson V600. I would love to get into printmaking some day, but currently don't have the facilities to do so.
I like to shoot all sizes of film. Most of the time, I will take pictures with my 35mm cameras, because it's enjoyable to take cameras out with you without weighing yourself down with a medium format behemoth, but I have a couple of medium format cameras that I really love to use. I also have a wonderful handmade Nagaoka 4x5 camera which I've been meaning to use more often, but I have not really developed a reliable process for processing and scanning 4x5 film yet.
My favorite film stock is HP5+ as you can see in the lovely rotating graphic in the background. That said, I usually shoot Arista EDU film due to its affordable price, and because I have had the most rolls to dial in my Caffenol process with it. Because I am often shooting cameras in dubious condition to test them, or cameras of dubious quality, I often mess up most or all of a roll, so cheap film is a great asset to me. For color film, I don't have a very strong preference because it's way out of my comfort zone price-wise, but on the occasions I've had a roll and gotten it processed by a professional lab, I have always had great success with Portra 160 and Ektar 100, especially in medium format.
Below is a non-definitive list of some of my favorite cameras from my collection. Click the links to see some photos taken with each camera