Former childhood Hornby OO fan here. I got out of the game in the early nineties, gave away or sold my stuff, and turned my attention to other matters... but I never completely went off the idea of model railways.
A few decades later I find I have bought one or two bits and bobs on ebay - the yellow breakdown crane and an Intercity 125, both of which I used to have. Waiting for delivery as I type. Now maybe when they arrived I'll display them on my shelves and that'll be nostalgia enough... or maybe I'll get the urge to start building a layout again.
The era that calls to me is childhood/teenage based, so mostly blue-grey shading into Network Southeast. I have signed on here so I can look around, maybe join in the odd conversation or look technical information up (e.g. I expect the Intercity engine motor will require a service) and basically dip my toe in the water in what appears to be friendly company. Then we'll see
