We had such a good thread on this subject on the old site - pity it was lost. Maybe we can get it going again...
Anyway, this follows on from the Carbon Fins thread and the talk moving to being correctly weighted if you want get back safely, esp. on a deep dive.
But there's a lot that can be said about weight management even on shore dives.
For me, it's about having the right weight for the diving you're doing, and getting it just right so that you're still 'light' on the bottom - not positively bouyant, but with just enough weight that the return is easy.
I remember seeing a perfect example of this when I was watching one of Gletwyn's video's - the one with Koos Jordaan at Leven. Koos has been diving that point for 40+ years and it shows - he's got his weighting so perfectly dialled that he's hovering effortlessly a few cm's above the bottom.