Well, they didn't 'coin' the name of mounts, but when you mention the word; WoW usually comes to mind. Yes i know every other MMO has them; SWTOR, WoW, GW, etc. But what I'm getting at is that I am hoping Zenimax don't fall for the usual 'cash-cow' aspect of creating games, which Blizzard are VERY good at.
EQ had mounts years before WOW came out but when i think of mounts i think of the 50+ different mounts you get in Vanguard. At level ten you can buy a mount or do the diplomacy quests and earn a free mount. Then at level 20 you can buy a better mount but at level 24 you can start your epic mount quests or start collection faction coins for anyone of the different faction mounts by killing named bosses.
If you don't want to do the faction mount coins or epic mount quests you can just keep buying a better mount every ten levels, they are horses or camels.
The racial mounts are http://www.kayoss.net/vgmounts.htm these are just the racial mounts.
Also this does not include the numerous flying mounts which are hard to get but if you put the work in you can.
Yeah i think of Vanguard when i talk about MMO mounts.