Okay....first off...this will never happen but I think it is the coolest Idea you could imagine...but I'm biased since its mine

....either way, it would be a GREAT chapter 4 addition if not 2nd birthday...
Anyway, post 319 is my idea but I'm going to greatly expand on that...
We are older now, and wiser (well, some of us

) and it is time to tame a dragon!!!....I envision a quest where you must complete a series of tasks to gain the permanent attribute "dragon trainer" and the skill "call of the dragon" (just like charm animal if you will)....you get 10 hp for each level of the dragon that you will mount (a baby dragon so it doesn't fly but is still bad-arse looking) up to 20 (200 possible max hp's) to which you will be "infused" to the animal (so in other words you both die while riding)...you do other quests to obtain skills (tail whip, ferocious bite, lashing talons, dragon's fire, dragon's scale armor, etc...) but you can still utilize the whole skill bar for your personal skills....so it would be conceivable to have 7 of your normal skills with "call of the dragon" being the 8th (to summon the dragon of course) and gain just the 200 hp or you can have all 8 skills in the skill bar as dragon skills!!!....more points you put in "dragon trainer" the more damage/protection/etc. you benefit from....
well...at least I think it is coolio and it would be absolutely awesome to show off that you character is 2 years old by roaming around the realms riding on a dragon!!!!!!
As to post 319...a horse could work in the same manner too....I just think a baby dragon would be REALLY coolio....