The Pentax 67 has to be one of the most drooled over medium format SLR cameras ever made. For great reasons too! The Pentax 67 is a film SLR that is more or less designed to be portable and shot handheld by fashion photographers and portrait photographers. For many years it was well regarded and even today, there is some fantastic work that is often done with the camera. Between this, the Pentax 67 II and the Mamiya RB67/RZ67, lots of photographers really have a tough choice figuring out what they want.
The truth is that it really depends on your style and it also really depends on how good you are at being able to create photos.