I second that... the last several years that I smoked, most of the time I didn't want to. I HAD to. I switched to vaping in January, with 18mg juices. When those started tasting "hot" to me (think of the sensation you get with nicotine gum), I replaced my 18s with 12s and found that I tasted the actual flavors more. When 12mg started tasting hot, I moved to 6. I'm now making the move to 3mg. Don't know if I'll step all the way down to 0, but I can tell you that vaping is becoming something I do because I enjoy it. And I don't get that "gotta have my fix now" feeling a couple hours after my last vape.
And of course, people change over time. Right now you're "mad for" the rush. That may or may not be true ten or twenty years from now. Don't stress yourself over the numbers... it still beats the hell out of smoking!
I had no idea the stronger nic levels would start tasting hot by themselves. Is this a common thing or are you just lucky that way? I'd love to be able to wean myself to a lower nic level when the time is right.