Been Mouth to lung from the start. Maybe, i dunno, six or seven years or so, maybe a bit longer !?........
Tried dual coil RTA's for a bit using higher watts but wasn't my thing (too much like hard work, like trying to inflate a lilo).
I rotate a few Kayfun V4's using 29g kanthal, 2mm id, 11.5 watts, 24 mg's. I'll take two draws, each over two seconds each, in succession. First's the primer, heats up the coil, second comes the throat hit !. Great throat hit everytime. Don't get a thing from the first draw though......nothing !. Throat hit is generated purely by nicotine and there is nothing harsh about it at all. 11.5 watts doesn't create a very warm vape and allows my batteries to last longer.
Mouth to lung vaping is effortless, and i love it !.