I've shot with a ton of film cameras. I've used Nikon, Olympus, Canon, Pentax, and a host of others. I have 3 favorites:
Nikon F3 - an incredibly versatile camera, you can set it up however you want. It is built like a rock, and probably has the best film advance lever I've ever felt, including Leica cameras. The primary drawback, in my view, is that it is heavy. Note that the difference between the HP and non-HP finder isn't huge, and even with glasses I preferred the non-HP finder.
Nikon FE-2 - Lighter, less robust, but in some ways more convenient than the F3. And I like the meter in the FE-2 better, since it is a match-needle design, rather than the small LCD in the F-3.
Pentax MX - my all-time favorite camera hands down. By a mile. A small, light, versatile jewel of a camera with a viewfinder that still makes me go weak in the knees. I can't recommend this camera highly enough. The typical cycle for a photographer is this: start with a simple camera, get enamoured of gadgets and features and upgrade, then upgrade again and again and again. Then you finally realize that simple cameras are best, and you have no desire to lug some heavy all-purpose behemoth around with you when all you want to do is take pictures. The MX is the camera to start and end with. The camera is so small and light, I can palm it. No need for a camera strap -- how liberating!!! And the viewfinder...mama Mia! The viewfinder is your window onto the world...it is how you see your pictures. The MX viewfinder is big, bright and beautiful. It trounces everything else I've seen, except one or two Olympus cameras, but their displays weren't as good. Also, Pentax makes some lovely lenses that can be had dirt cheap.
One more piece of advice: skip split prism focusing screens. They feels safe, because they give a sense of mechanical precision. But I don't find them more accurate than a simple ground glass screen. And a split-prism is always in the middle of your viewfinder, blocking your view of your subject. I actually found that I could focus faster with a ground glass screen - I didn't obsess over lining up the split prism, yet my results were just as good -- I tested.
One more piece of advice...there is a guy on ebay called Luigi who sells "soft releases" designed primarily for Leica cameras, but they work just as well with old manual focus film SLRs, and improve the picture taking experience more than you would ever believe possible.
Enjoy!
Best regards,
Adam
P.S. if you decide to go for a Nikon, let me know. I have a ton of Nikon film SLRs I would be willing to sell, would be happy to give you advice, and I also have a big collection of lenses I would be willing to sell. But go for a Pentax MX and one of their 50mm f/1.7 lenses....trust me!