Oblivion missed two (and in robes 3, but since all legs and chests are combined now that seems moot) important pieces of clothing and both really ought to have been included. The first is Gloves. If you were a caster and you wanted to fill your enchant slots the only option that didn't mess with your casting was Wrist Irons which aren't exactly fitting for an Arch Mage dressed in resplendent robes. The other missing piece of clothing is important for more than just mages: Cloaks. Modders can do decent cloaks but they are always going to have the same ultra-stiff issues that Bethesda could more than deal with. Look at Hemingwey, his cloaks are likely the best out there (not to devalue other modders) and they still look like they are carved from wood and have some ugly clipping issues,
Please Bethesda, give us Cloaks and Gloves.