The 635 that I once owned took great 120 format pictures. The 35mm was another story. First you need a conversion kit; then you can only shoot with the film in the one perspective , unless you turn the camera on it's side . Try shooting like that.
The lens on the 635 in most cases wasn't the Yashinon, which is the best that was offered by Yashica. For about the same money or even a little less I would suggest the 124 or a 124G. the 124 was a little bit more rugged construction. Whatever you decide, either camera will be a joy to use.