Bouyancy recomendations

What rule of thumb do you guys use on weight.
Some of the divers I talk to say its better if you have to swim down the first 10 feet or so.
Some say you need to sink as soon as you deflate your BC.

With about 500+ lbs in my tank I was fairly neutral at 15 ft. This was 4 lbs less than the 18 lbs I started out with.

Key West 1720 90 4 srtk Yamaha