Javier, you're having better luck than I with that FD28. Really love the shot of the guy in the hat. I bought an FD28 for my AE1 after I had had the camera for awhile and am having a hard time finding a groove with that focal length, not just with the Canon, but my Pentax gear as well. Maybe I just need to shoot it more. (Loving the Ultramax 400 <g>).
A quiet Sunday in Hartford last July 11 (2010) Canon AE-1, FD28 f2.8, PlusX
Tried to get "arty" with this one with varying degrees of success...
Upshot is that I never seem to feel comfortable in this focal length. Your shots have an ease to them that I feel mine are lacking. Maybe it's all in my head <g>.
Best,
Kevin