One of the best things about the OSR is the easiness to steal things from different games and insert them in your current one without much fuss. Whitehack, for example, has a great simple mechanic that lets you put more color into your character, at the same time it let's you contribute to the world creation and his abilities. Vocations can also be easily inserted in other games, like my favorite one, the Dungeon Crawl Classics RPG.
In Whitehack, every character gets to chose some words (called groups) that associates it with some element of the game, be it a career (like barbarian, pirate, desert raider, astrologer), an organization (Order of the Chroniclers, The Seven Stars Society, The Purple Hats), a race or culture (Shadow Elves, Atlantean, Cimmerean, Diamond Dwarf) and other things. This lets the players link their characters to some aspect of the game world and gives them some identifiable characteristics (not to mention the possibility of creating campaign elements by themselves doing that). The other thing that it does is allow the player to roll and ability check relevant to this element twice and keep the better result.
