I use the Eleaf iPower Box MOD and I love it. Works great for me. When I'm on the go and want a smaller device, I grab my Eleaf iStick Pico. Also works really well!
There's currently a bill that aims to disallow taking any form of electronic cigarettes onto an airplane, including carry-on and personal luggage . . .. ugh!
I was a pack a day cigarette smoker, but was still relatively athletic. Of course, it was more and more difficult for me to even run up a flight of stairs, which is a large part of the reason I quit. You're not nuts--many vapers are also very active.