I'm lucky, in some ways, to have a renowned, retired Rollei tech-guy, with 40 years experience servicing and repairing them, living about a mile from me. He's done great work for me and he told me his favourite Rollei is the 35. This confused me as I'd have thought that he'd have preferred one of the more esoteric TLR models.
Anyway, he gave me a brief, but thorough, review of the various 35 models (most of which I've forgotten) but the one thing that stuck with me is how much they managed to condense into such a small unit. This seems like a great idea, on one level, but having to remember not to collapse the lens when the shutter is cocked (or some such) and not nudging the rewind button by accident seems like a recipe for disaster - particularly if you're as clumsy and forgetful as I am. I have an Oly XA which produces great negs but is so tiny and fiddly in my hands that I barely use it.
I like to travel light and I like to be familiar with my cameras - but there comes a point when a marginal reduction in size tips the balance and I reach for something that is usable. There's a lot to be said for cameras that can be used whilst wearing gloves...even if they weigh a bit more and need a bag in which to carry them.