Way to go, Rwiv. I can't even imagine going back to analogs now. To answer your question as to why it was so easy...well, physiologically, your body was still getting both of the things it was addicted to with analogs; the nicotine intake & the oral fixation + physical motion habits. Once the body is satisfied, it's all psychological, and the knowledge that you're making a healthier choice is usually enough to convince anyone as long as they have a good alternative like e-cigs.
I'm guessing you also feel 1000% better physically, as well? No more coughing, shortness of breath, lack of stamina? Ain't it great to actually smell & taste things again, too? If you've only been quit for a couple weeks, these senses will get even better.
Keep it up and welcome to the wonderful world of vaping! I'm still somewhat new to it myself compared to others, but I'm lovin' every minute of it!