We could have wyvern-style dragons that evolved from the Archosauria lineage, but a hexapodal (6-limbed) dragon would be unfortunately impossible given the natural history of this planet - evolution seems to have favored tetrapods, and in my experience, there are no known hexapod vertebrates in the fossil record. To make the hexapodal dragon feasible, you have to establish an entirely new offshoot of vertebrates and work your way up the evolutionary tree from there to make it believable. That's a lot of world-building right there, so it would be easier to assume that dragons were 4-limbed, like pterosaurs were, and work out the evolution of the structures needed for firebreathing - a lot easier than trying to justify a hexapod in a world of tetrapods.
I totally would - I love hanging out with archosaurs, as can be seen in this photo taken by my fiance as I cradle a baby alligator in my hands at the Alaska State Fair in 2010.
https://twitter.com/alaskanime/status/364946459042385920/photo/1
http://cyrillictypewriter.tumblr.com/post/1125266511/h-sapiens-holds-a-baby-alligator-at-the-2010