I have been hosting people from all over the world through Airbnb for more than three years now and have really enjoyed the experience. Chatting with guests upon check in lets me not only tell them what a great city Boston is and how much it has to offer but to also listen to stories of where they live or have been to. That's what makes Airbnb such a great community builder in my mind - connecting people from all parts and walks of life.
Just like all of the travelers that I've hosted, I am a traveler myself - having been to a number of countries in Central Asia, Europe, and lived for a time in Micronesia. Each time I travel, I make sure to find a local connection to tell me about places off the beaten path that a tourist guide might miss, and if all else fails - I just enjoy seeing where my feet (or a local bus/train/subway) take me. So if you're looking for the best Ethiopian food in Boston or a little known museum (a whole room of the most realistic glass flowers hand blown in the 19th century), I can definitely point you in the right direction.
Speaking of directions, I bike a LOT around town and would be happy to provide a bike when you stay at either of my places. Boston may have a great (oldest in North America) subway system, but sometimes it's just nice to get on a bike and see where the next street takes you!
What keeps me not only travelling on Airbnb but also hosting are the notes that I frequently get, letting me know what a great time someone had or how much they enjoyed visiting a part of city I mentioned to them. These notes always put a smile on my face and leave me knowing that I have made someone's visit memorable!