To meet nice local good people and get the best out of a travel experience. I also feel like mentioning the 'saving money' part. Plus, as soon as I'll get a big flat with a couch I'll be glad to host and show travellers a bit of real, out-of-turist-guides Italy! Ps: Airbnb sucks (I can explain the above statement in details in exchange for cookies).

Tea, food, laughs, and stories. Most likely also tangerines.