If you're anything like me, when I began I wanted a small ecig. I read the forums, though, and fortunately I saw the benefits of something not so traditional. Vaping is very much like the "act" of smoking, but it is a different beast altogether. It is much more pleasurable but, from what I have gathered, is very disappointing with the wrong equipment. I truthfully don't think you would be happy with a small ecig because you stated that you travel alot. For a reliable vape I would suggest the Joye Ego from all the feedback on the forum. I myself have the Joye 510 Mega, it fits my needs, but I am always near a power source and really don't worry about my batteries going dead. From others on the forum I gather the batteries in the ego last a long time. I imagine nothing is worse than switching to vaping and being somewhere you cannot charge your ecig. To further simplify your life I would also suggest cartomizers (a fusion of atomizers and cartridges) they are very easy to refill, they last at least half a day of moderate vaping and they are easier if you are very mobile, making two pieces one.
I smoked menthol most of my smoking life, but when I quit smoking last time I got hooked on regulars. I really can't recommend a good menthol, but one of the pluses of vaping is the great variety of flavors. I will recommend 555, it is good. I am also partial to chocolate flavors and strawberry. Everyone recommends r4y, but I have only sampled one vendor and I was more pleased with the 555 from another.