Quote Originally Posted by sonofzeal View Post
In the (far more balanced but recognizably 3.5) D&D MMORPG, "Toughness" gives 2+level hp, effectively combining Toughness and Improved Toughness. It's one of the most popular feats in the game.
DDO isn't more balanced than D&D.
It's actually 3 + HD.
It's the most popular both because of that and because it unlocks the ability to get 20-80 more HP depending on class and race, and because there are so few good feats worth taking so you might as well take the one that lets you take the abundant 300-500+ damage hits to the face and live.