Rebel XT (paid 1/2 price brand new soon after its release, started the slippery slope)
Then bought 50mm 1.8
Then Tamron 17-50 f2.8
Then Canon 70-200 4L
Then Sigma 18-200 3.5-6.3 OS (for a trip to Europe, didn't want to lug around the above, looking back, probably shouldn't have bought this)
So far, never really had the urge to upgrade the body because of the relatively small upgrade from model to model, but at this point, any body would be an upgrade.
I've always been more the technical type than the artistic type, understanding aperture, exposure, DOF, then experimenting and then controlling them to get the shots/effects I want is what I focused more on at first... I've not done much photography lately, but when I've done I've tried to put on a new hat, and try to worry more about composition, something a new body wouldn't really help with... Although a brighter and larger viewfinder would probably help, or be more enjoyable to use... hmmm... I'd like full frame, but then also would have to lenses...
Don't know what exposure latitude is, I'd guess the acceptable range before the image is over or underexposed... Hmm... Not a bad guess. Reciprocity Failure, looked it up, wouldn't even have tried to guess...
Here's a few terms. Bokeh, tilt shift, vignetting and futanari. You might have to look up the last one...
Oh, and I like much more to take the pictures than mess with them afterward... And with digital there's often a lot to process afterwards. I should definitely try to do some online albums, but that pretty much fits into the don't like to do the processing afterwards...