I started with an Innokin SVD and iClear30, the first version, and it was a complete disapointment. Even so, I didn't smoke a cigar, but thought "probably there's something better for me out there". So I got a Protank... what a difference, day and night. Sure it was colder, but flavour and vapor was better. The coils on the iClears were very badly made, I took them off...man, they don't know how to wrap a coil.
I then moved on to the Protank2, better draw, all the rest pretty much the same. I still found a little lack of flavour, so I kept on searching until I found a Kayfun in other forum's classifieds. What a hell of a difference. Easy peasy to coil up, first coil first success. Never went back to the Protank. I also tried a genny, the Steamboy, but too much hassle, I'm not that much into gennies.
Since then, I've moved on to mech mods, first a Nzonic IV which I sold (though it was a great mod, just a tad biggie, sold it when I found black version was coming), then Nemesis (real one), russians (kayfun clones) both the first and the 91, nimbus...And that one was, yet again, a game changer for me. Found so much flavour, I sold it in a week, and bought a REO straight away. This is as close to perfect vape as I can think IMHO.
Everyone prefers one or other atty, or setup. It takes time to find the "OMG" vape, but once it's reached...which requires money, study some things carefully and, lets say it, guts to make the move to RBA...well. Then you find vaping is nothing like smoking, you can actually enjoy it A LOT.