You just opened yourself up to a barrage of peoples "my favorite" so I might as well toss my hat(suggestion)in. Olympus OM-1, 2, 3, or OM-4. Do not look at the double digit or letter versions, and especially run from an OM-2000. The single digit OMs are pro quality and durable as heck. The OM-1 and 3 models are totally mechanical and only utilise batteries for the meter. The even numbered OMs rely on batteries to operate everything. The OM-3 and 4 have what has to be the best built in spot meter of any brand, look for a T or Ti at the end of the model designation for the latest, and most reliable model. The best part is the smallish size of the bodies, and lenses with optics second to none.