Just to introduce myself - Marcus Rowland, retired lab technician and author (mostly of role playing games), resident of London, UK. In the seventies and early eighties I did some part time work for Morgan Cameras, a London used camera dealer, so I've seen a lot of strange gear in my time, especially at the vintage end of things. My main interests are scientific and nature photography, macro and micro, occasional pictures for Wikipedia, etc.
As of next month I will have been a Nikon D50 user for ten years, before that my main camera was a Canon F1. Since Canon digital cameras use a different lens mount to the F1 I had to sell most of my lenses and switched to Nikon when I went digital. I'm sticking with the D50 because I mostly take photos for web sites etc. and rarely want really high resolution, also because it's reasonably sensitive to infra-red with the right filters and I like messing around with infra-red photography occasionally (though I would LOVE someone to come up with a digital SLR that shifts the whole spectrum to emulate infra-red Ektachrome!) A final reason is that it's cheap and relatively expendable if I get mugged, drop it in a canal, or something...
The lens I probably use the most is a Tamron 28-300mm XR, not the most modern lens but it's built like a tank and my go-to lens for eBay listings and general photography, and still has the option of manual aperture control. I've also got a Nikon AF-S 35 1.8, Nikon AF-S 18-55 3.5-5.6 VR, a Lensbaby 12mm fisheye (not the full frame one, the cheaper version for their interchangeable element system), a generic manual 500mm F8 lens, and usually one or two others - I buy and sell a lot of cameras and lenses on eBay, and tend to keep the interesting ones for a few months before I sell them on. For example, I've just finished playing with an Itorex f40 (really) 50mm lens which is a sort of predecessor of Lensbaby and "lens in body cap" designs, and have just begun using a weird 135mm f2,8 bellows-mounted lens for macro photography. And I just picked up an SB-25 flash in a car boot fair (US = swap meet) today, I'll be playing with that and deciding if it's better than the Jessops flash I currently use if I want extra power.
My most recent photo - a cactus, about 0.5x with the bellows lens.
Hope that wasn't too boring...