The next time you need to take a photograph quietly, you will know why you need a TLR to complement your SLR.
You may find the bellows in the C33 to be useful too.
The last time I took my C220 to a Seattle Mariners baseball game, I got lots of fascinated stares. Might have got similar interest with a Bronica, though.
Probably most important, though, is that it is really useful to have a backup camera, especially one as rugged as a Mamiya TLR.