Another passionate Brompton owner here.
It would be the first one I rescue if the garage was on fire. It's such a do-it all machine with great transportability.
I don't find the 16" wheels to be a problem except over very rough surfaces and cobbles, on reasonable tarmac it's pretty effortless. The complexity of changing a rear-tube on a Brompton is also over-stated, it's not so complex, just a short learning step.
Finally, yes you do become part of a community, they engender a certain 'love' with their quirkyness. It's a bit like Apple products, everything is bespoke, but it all works really really well together - bags/accessories etc.
Absolutely agree with all of the above.