1-20 sucks period, everything good comes at 20+ including instances lol(RFC doesn't count you horde bastards ;p)

I highly recommend questing in general; it's less boring than an instance grind, it keeps people aware of you as a lvler/quester and not as a farmer hopefully(I haven't had a single report yet that I know of and I interact with most alliance and horde both that I run into as I quest), it gives you high amounts of rep now(I think some of 'em gave me +500 Alliance rep, and now that EVERY Rep level gives you a discount of 5% each step it's nice To put it in perspective, my 50s have higher rep levels than my 70 does with pretty much every Alliance faction, and THE 70 HAS BEEN DOING SOME OF THE QUESTS WITH THEM. That both means it's only good near-level, and that the rep gain for quests I did do with the 70 as I lvl'd have improved since then.

It's also allowed me to find the Lunar Festival elders this week scattered out in my lvling areas, +75 Alliance rep each and +10k rep if you find 'em all lol; with 2.3's changes too it's simply too effective to ignore even if you're an instance grinder