I would say that in the beginning as long as the equipment works, that is all you need, getting bottom time in and doing different types of dives to get exposed to what can be done and seen.
When I started diving I was using just back inflate BC with just an oral inflate and only one reg, no octo. That was at the time that I was diving with my grandfather and before I was even certified. (I know, don't start on this one, I didn't know what I didn't know at that time)
I got certified 5 years ago and when after I got certified I bought the jacket BC that I used in class, and had the reg and tank from my grandfather. I had an octo put on and a new gauge as well. I dove the jacket BC for about 2 years, then bought another back inflate and almost right after the back inflate bought a BP/W. I then said I was going to keep the back inflate for travel and keep my BP/W for my local dives. After a few dives in the BP/W I decided to sell the back inflate and keep just the BP/W.
Now after I have racked up some more dives, I am finding that I want bottom time, not necessarily depth, I like to poke around and look into the rocks, crevices and holes. I am not about diving deep for the sake of diving deep, but if it is to see something worthwhile then I do it.