You get more exp for items above your level. Also, after level 6, all items that are at your level only have a 95% success rate, you have to be over in order for it to be 100% successful. I dunno if this applies to items at level 10, it would sure suck if it did. For mining and herbalism, you get 1 extra exp per level above a certain vein or herb is and -2 exp per level below.
Alchemy (From Level 2)
Blacksmithing (From Level 4); Probably also applies to Jewel Crafting