While I went from lvl 1/1/0 to lvl 100/100/100 without extensive use of biped buffs I can tell you that the only buff that as a dragon I really missed was Gift of Alacrity…With GoA you do a strike on a mob or resource node a whole of a lot faster, cutting back on gathering time a freaking lot while in the resource fields.
Part of the issue of dragons wanting biped buffs is also probably due to the fact that dragons have only 2 real gifts while like bipeds they have 5 gift slots. In fact for me 3 of those are ALWAYS empty except when I meet a biped in Bristugo or whatever place I am at the time that buffs me without me asking or just before a battle against one of the Epics…
Dragon’s Gift : Very nice to have, but be honest when you already have 1000 skill that small amount will not really help for Primal and TnC.
Gift of Velocity : +10 Flying speed… Technically a 10% raise in flying speed, but not really all that useful in either crafting or hunting.
It is all really nice that dragons have their own selection of buffs, but some last 15 minutes and others 30 minutes (like bipeds also probably have). The biped gifts last for 2 hours (just like the 2 in hunting and crafting useless gifts we have).