Oh - I forgot to mention that the TLR style makes a difference to your photography, too.
I had a few TLRs - first a Mamiya C220, which was cool, but big. Later, I had a Rolleicord, and (my favourite) an MPP Microcord.
Holding the camera lower gives a different point of view, and the act of composing a scene on the ground glass screen is an enchanting experience.
To tell the truth, I never really came to terms with the square format, but it can make for very striking images, particularly if you are creative with your use of symmetry & framing. They won't ever be particularly dynamic, but there is something about the square format that draws people in to look more closely. My Mamiya I mainly used for still life and photomontage.