I actually fear almost nothing. Seriously; I know it sounds like bragging, but I have almost no opportunities to be brave, because I lack so many fears that others require courage to overcome.
Large Exception: dentistry.
By the time I leave the office every nerve is screaming and every muscle is locked up like a bank vault. It takes days before the soreness wears off. The whole time I’m in the chair I have to fight the irrational urge to leap to my feet, punch the hygienist and dive screaming through the window.
All that being said (hey, you started it with the oversharing thing) I strongly recommend gold crowns. I have four. They last indefinitely, unlike porcelain crowns which have to be periodically replaced as they are very easily broken. Also, they literally cost about $20 more than porcelain (at least in my area, where a crown costs well over a thousand dollars.)
Dentists typically do not recommend them and have to be persuaded that you know what you are asking for. However, the biggest demographic for gold crowns? Dentists.