I mostly favor DC rods...7018, and currently am using some from a local weld supply place nearby. I think they are Excaliber (?) in 3/32". They are OK. I also have about 25# of Hobart 1/8", which are also OK.
In the past...back when Airco existed...their 7018MR were my favorites. I hated Lincoln 7018. It welded OK, but my complaint with Lincoln 7018 was due to the damned coating. If you stick a rod and wiggle it loose, the coating would break off for a 1/4" to even more....so you had to burn off the bare metal on your ground block or whatever....the Airco did not do that. Also, if the tin can had been mis-handled (50#), there'd be a bunch of semi-ruined rods to deal with. The coating on the Airco was not as fragile. Lincoln 6010 (5p or P5 as we called it) being a different composition was OK.
I have no idea if the new Lincoln 7018 is any better, since I heard they took over Airco?
As to 6011,6012,6013,7014 or 7024 I have no brand preference...but everything runs better on DC!!!