"never enough" isn't allowable. I"m wondering what is in people's collection, and what they use on a regular basis. Using the Reidism, it seems that you'd want at least one of various sensor sizes because they "draw" differently. But there also is an issue with usability and learning a different "manual of arms" (for those of you who shoot things other than cameras).
Right now I have:
D Lux 3 (what I mostly shoot with at the moment)
Panasonic FZ-20 - long throw zoom (36-432) that can be useful but I'm not crazy about the IQ..almost never use it
Canon SD400 (what I used to shoot with a lot, very pocketable but now used by my 11 year old son)
Nikon D70 - used to use a 105mm micro almost exclusively but the sensor is now sick and I sold off all the lenses anticipating a switch to Pentax. Either will sell or let my son use it (he loves manual focus)
Canon A620 - got it because it was supposed to do macro well. Ended up giving it to a g/f.
I'm thinking small sensor, dslr with a couple lenses and that could cover it. But it is fun to have different approaches, and the GRD2 still calls to me as I think that shooting with it would change my approach (just as the 16x9 of the DLux has). I also am moving more manual as I go...one thing I like about a dslr with old prime lenses.