Right now, I have a Rolleiflex 3.5f, a Lubitel, and a Ricohflex. I once owned a C220, and have used Yashicamats, which were borrowed. I like the way they all made me view a scene. Something about looking down while seeing forward makes my eye/brain connection work a little differently, if that makes sense (much like an inverted image on ground glass). I also like the square format, as the equal sides adds "tension" to an image, whereas rectangular images have a degree of directionality. A square image will pull the viewer's eye to the edges evenly.
TLRs are slower to work with than 35mm, but I consider that a plus. Loading the cameras take a bit more time... Having fewer exposures makes us more circumspect in what we choose to shoot... The larger negative is a joy to print...
As an aside, I think the move to a larger format also has benefits when returning to 35mm. The slower, more thoughtful way of shooting will improve one's 35mm working methods.