Hi JennyWren (we have a Jenny Wren in the next village). No, not really. As foxfish said, I only dive to 10m and often less. For really shallow stalking I could really do with a couple more pounds of lead to help me stay on the bottom. I should also mention that there are several areas where I differ from you, judging by your avatar picture: I weigh around 235lb and my body fat level is not as low as it once was, I have an unusually high measured lung capacity, i wear a 5mm spearo wetsuit and, as I said, I only dive to 10m.
I was pleasantly surprised to find myself gently gliding to base of some boulders on my last dive out. Usually I have dive down and hold onto weed. So probably a bit deeper than normal or perhaps I've lost a little weight (felt some cold water up the back of my tailor-made wetsuit which is usually the sign

).