I bought my dive gear about 10 years ago - very basic Oceanic set up - Probe BCD, GT3 2nd stage regulator and octo, Oceanic computer, Henderson 5mil wetsuit, boots, XS Scuba mask, second-hand split fins. It has been very serviceable. Our local dive shop sold and serviced Oceanic, so it made sense to purchase this.
Since then I have tried to reduce bulk and weight of my gear. I bought some light weight Aqua Lung Hot Shot fins that are lighter and still have good thrust. Switched to a Scubapro MK25/S600 regulator. I tried several and liked the way it worked for me. I changed to a lighter BCD, Aqua Lung Lotus with a backwing and Air 3 - it is lighter and fits close, the jury is still out on the backwing part. I still use my Oceanic computer and bought a wrist unit of a similar model that I wear as a backup computer. I am still using my XS Scuba mask that I love, but they no longer produce and it is aging from frequent use. I am looking for a replacement, but I do not see anything comparable. I have a backup mask that I do not like. So its a mix of old and new for me.
I have added other wetsuits (7mil and 3mil), several pairs of boots (hard-soled and low rise).