In the past 6 months I've shot 100 feet of Kodak Plus-X 125 in 35mm, Plus-X in 120, Ilford HP5 400 in 35mm and 120, Kodak TMax 100 and 400 in 120, Ilford Pan F 50 in 120, Ilford Delta 100 in 120, Ilford FP4 in 35mm, and recently was given 100 feet of Kodak Tri-X 400 as a birthday gift. I've also shot two rolls of Ilfords SFX 200 in 35mm, one without the deep red filter and one with, but SFX is supposed to be a near infrared film, so I won't include it. I bounced around some much because I was trying to find the best film for me, and it took some time because I had to learn what it was I was looking for. Originally I wanted the best resolution with tons of sharpness all the time no matter what. It wasn't until a lot of experimentation that I really learned what it was I wanted. For 35mm I now am using Tri-X as it is very flexible, its a fast film, and it can be pushed quite a bit. Its not the sharpest, or the highest resolution film, and I'm happy with that. The only reason I went with Tri-X over the Ilford HP5 was because the local store didn't have HP5 in a bulk roll, and I couldn't tell much difference between the rolls of each I'd developed before deciding. With shooting medium format, I'm still looking for the clarity of a high resolving film. It was because of this that I originally went for TMax 100 and 400. I've had bad luck with the film though, getting a pink tinge that goes beyond acceptable, or requiring washing times 4 times whats normal. The pictures also lacked the amount of contrast I wanted, but I knew that was something I could fix later. I'd given up on using TMax though because the development was such a pain for results I didn't like anyways. I'd almost given up on black and white film in medium format altogether until I tried Delta 100. I must say, I love Delta. I haven't tried the 400 speed yet, but the 100 speed has given me great contrast and fantastic resolution. If you're looking for a cooperative, high resolution film for medium format, give Delta 100 a try.