QUOTE (Critias @ May 24 2013, 11:00 PM)

I think some of that just comes from the granularity (or lack thereof) of the system as a whole. Is every character as likely to get as much mileage out of "Aeronautics Mechanic" as they are "Perception" or "Pistols," really? Probably not, but they still cost the same to learn (as as "Manabolt" versus, I dunno, "Fashion" or something).
Down the road of ranking things by popularity and some measuring stick of utility (which is innately going to be a hot topic in and of itself) lies varying skill prices, ranked abilities and attributes all scaled based on how useful they are, and all kinds of other crazy stuff that complicates a system (even if they get it exactly right).
Shadowrun has made various attempts to deal with this issues regarding skills. The unique Firearms skill in 1st and 2nd edition was broken down into five different skills in 3rd edition (Pistols, Submachine Guns, Rifles, Assault Rifles and Shotguns), down to three in the 4th (Pistols, Automatic Weapons, Longarms), along with the introduction of skill group mechanic. Computer also used to be a single skill, that 4th edition broke down into five skills (Computer, Data Search, Software, Cybercombat and Hacking). The 4th also streamlined the list of Mechanic and Pilot skills, though it could be argued the four Mechanic skill could be wrapped into a single one with appropriate specialization, only based on the skill use in game. On the other hand, Artisan has often been decried as not making a lot of sense (another example of this was 2nd edition, where you could learn entire language families at once, like "Roman Languages" and speaks French, Italian, Spanish, Portuguese, Romanian...).
Spells would be obviously more difficult to divide or merge the same way. The more useful are too straightforward to be divided (unless anyone here consider making Levitate Human a separate spell from Levitate Elf is a good idea). Merging spells would require to combine different effects into either a single rule or lengthy description (like detailing Fashion so that it effectively and legally double as a "Turn to Armor" spell if cast as a high Force spell).