I recently got rid of my F3, partly due to the financial issues I've been having, and partly because I didn't like the meter readout. Unlike the F, F2, F4, F5, and F6, there's very little information given by the "+-" indication in the viewfinder that signifies correct exposure in manual mode. The only other F series body that's this way, is the Nikon F2S with the DP-2 finder. Personally, if you're looking for something more reliable, maybe look at an F2A. But, don't let water get inside it, otherwise, you might corrode the internal mechanical parts. Same with the F3.
I'm actually a bit happier now that I don't have the F3. Instead of replacing the F3, once I'm financially solvent again, I'm going to pick up a motor drive and a DP-12 F2AS prism for my F2, to replace the temporary DP-1 prism that replaced the original F2A DP-11 prism.
-J