Hum, let's see,
In my first set, the fins were crap (totally rigid) seac f100, switch it with volo race which i do love.
Underwater slate, underwater "bell", we do not even take them with us underwater anymore.
I did like my zoop but did upgrade it for a d6i (for AI, freedive mode and limited gas switch)
My first 7mm used wetsuit, very old school beuchat wetsuit (the old blue one with long john), almost spearhunting suit style, was a nightmare to put on and off. The zipper broke on the top, and the fit was so tight, water did not even came in then....
I did buy "rigid" belts wich i do not use anymore (i do use the bck-lead-pockets), and weight blocker for the belt.
I do regret buying a "platine" for my camera as we finally find it easier to do the photo togother (my wife and i), one for the lighting the other one with the camera.