To me its the character development, I want to think and plan my character development like I used to do in DND 3.5.
I feel like i'm playing World of Warcraft after playing Everquest for years. It's just too shallow. All prestige classes addition doesn't bring much to the table.
Skills shouldn't be lock under an ability score. If I want to make a fighter archer, I should be able to do so. Fighters used to have a feat developmeent every lvl.
Ability increase shouldn't be an option between a regular feat. Current Feats are totally boring.
I miss DND 3.5