Translation of sulfuroso

His name was Leo and he would become a good friend of mine during the next two weeks. He had a lovely girlfriend where he stayed during my visit. Basically, I slept in his place when he was away.
In addition, after the tests I would like to give also a presentation to some of the teachers, as usually the different ideas come with the presentation. After speaking with them, some ideas emerge...
After a short guided tour we came back to pick up our luggage and left to the airport. When the airplane took off it was already dark outside. We were surprised about the airline's good condition and service.