Indeed, this thread is so good.... I grew up with Olympus, the Pen FT followed by an OM2s in '84.... I recently found an OM2n which truly felt like a homecoming.
Re Leica's R - here's a couple of shots I did comparing the Minolta version of that tank vs the ballerina OM
(both with the 43ltd/K100D)
The OM2s was my only camera for some years; I bought the Tamron adaptall SP 35-80 2.8-3.8 in a fit of ennui with 'just a 50mm'
In the mid 90s I bought a Zuiko 85/2 from KEH, it is a wonderful lens indeed, I highly recommend it. And the OM2n came with a 28/3.5 Zuiko, another little jewel.