One well known example of someone who used an RZ67 handheld from time to time:
[photo of Annie Lebowitz deleted]
Annie Lebowitz primarily used the RZ in a studio. I assisted for a fashion photographer who handheld on location an RZ with a long lens ALL DAY. He told me the ability to flash sync at all speeds and the ability to rent lenses or replacement bodies wherever he went -- this was early 2000s --was important. He uses Canon digital equipment these days...
As Matt said earlier, ergonomics are very important. I used to shoot weddings with a Hasselblad 501CW and the lack of a light meter annoyed me. Also, I screwed up the lens attaching to the body once during a shoot. The variability in sharpness mixing inserts and A12 backs annoyed me as well. I ended up buying a Rollei 6008i, although a loved the 180CFi lens and would have bought a 200 series Hassy except they were so expensive at the time. Functionality for the type of shooting you do is also important. For example, if you are shooting outdoor fashion with a strobe, a Contax 645 is probably not the right setup for you, even though it is a wonderful camera. If you are shooting nature you probably want the largest image area possible. I would add cost the ability to fit D-----l backs (if this is important to you) as consideration.
For the original poster, I would keep shooting the Hasselblad a bit more and see if it grows on you. Many people can repair Hasselblads. The Hasselblad 60mm, and the 180mm are among the many excellent lenses for this platform, in my opinion. And, you can use extension tubes to get closer focus. I keep my Rollei extension tubes in Portabrace pouches in my bag and I can add them to my lenses quickly.