First off, VERY COOL! It is amazing that you are having the opportunity to travel and create these Vlogs. It is cool that I can behold your journey
I watched the vegas and china trip vlog, and the only feedback that came to mind was about the choice for subtitles. I am a bit torn on this, but I felt it took away from the shots to read the subtitles when I would have preferred to view the places you were. I think a solution for this is to add a voiceover on certain shots thats you want to add subtext to? This way the viewer can hear you and naturally connect with you as a traveler too. I think if we see/hear you talk to us about your journey as it is happening, I will feel more inclined to comment with travel question...and feel like I am traveling with you!
I completely agree with you, i wish i had that natural flare but im a bit nervous of getting in front of the camera in that way i dont think it would come natural to me! maybe i should try someday.