Started vaping a cpl months ago, cpl of RY4's, US Mix's, Mr E's Grey Matter/4 of a Kind, all around the 70PG/30 VG range and 12 nic, and have liked all of them, none made me cough or heave. Ordered some Mt Baker Cin Roll (65PG/35VG, but 0 nic) and REALLY love the flavor, it's great, but.... as soon as I inhale it, it makes me cough, or kinda heave like me body wants it out quick. It's a shame, because I like the flavor so much, but can't take the way my lungs handle the inhale. Wonder why the other 70/30 ranges were fine and this one's almost unvapable (have to admit I'm still vaping it as I like the flavor so much), could it be the 0 nic, or that I need to let it steep, or that I need to still experiment with the PG/VG mix (even though the prior mixes were perfect), or just that this certain mfr's juice just doesn't work for me.