Out here on the lower left coast sikkens cetol products are probably the most commonly used, 3 coats every couple of years.
http://www.yachtpaint.com/USA/hotlin...kens_guide.pdf
weathered teak takes on a sweet silver patina that lets everyone know your boat is your pleasure not your chore. Check out Bigshrimpin's Seafari on Stricks "Life is good post." Looks pretty dignified to me. Especially with that Sierra Nevada Pale Ale nearby

If you want long wearing sheen/bling check out using Smiths epoxies like CPES as a varnish primer to dramatically inhibit and slow down the mildewing & deterioration Capt. Lloyd speaks of. Glossy teak + sun + saltwater = hard work