Armourer: Enchanting success
(Reloading, Adding Opts, Crafting success, etc)
Identifier: Identification
(Higher chance of getting Bless, Mounting, Opts on stuff identified by them)
Teleporter: Droprate
(Increase in item droprate on all maps)
Arena Manager: Reduce level gap
(When fighting higher level chars, favour will reduce the perceived level gap between your level and opponents higher level)
Storage: Dunno
(I heard that you get free additional slots in storage and inventory
- need confirmation on this)
Wine Merchant: Dunno
(I heard mercy xp gain is increased by favour percentage and skill success probability for merc and merc inflicted damage also gets increased
- need confirmation on this)
It's probably posted elsewhere in the forums, but too freaked to go searching..
Hope someone else can give clearer inputs on this.