Been using mtl rtas from the start, over 8 years and have never wanted or needed to change , so I vape exactly the same now as when I started, almost exactly. I started with 28 and 39g wire, but now use 26g exclusively. 6 wraps 2.4 mm coils gives me around a .7 resistance and at 20 ish watts and 24mg nic, it's a killer vape, heavy on TH, but low on mls of juice. I vape less than 3mls per day, so love small 2ml rtas. Wicking is rayon and use plain ole kanthal, no TC. I like a fairly tight draw, around 1.2 to 1.6mm. Preferred rtas are many, as I have at least 6 in rotation, all filled with different juices. Kayfun lite 2019 is nice, as well as the km3, reaper, erlkonigin, doggies, darvws, primes, etc. Theres not much that I wish I knew when I started, as it all was just starting out back then, but wicking is the key. It simply takes time to perfect a build and each rta has its quirks. My rtas never leak and never get dry hits, so its , imo, the best vape I can ask for....