I'm a software developer who travels quite a bunch these days. I've been to several conferences recently, and I visit clients in other countries occasionally.
I love reading, playing video games, and doing/thinking about software (even though it's super frustrating at times). I spend an awful lot of time working on software based side projects, because working is the best way for me to learn things.
With regards to style of travelling, I like packing really really light, and relying on friends at wherever I'm going to help me out with finding things to do. I find the best things I do whilst travelling are almost always unexpected things that a friend said I should check out. I love exploring cities, and learning weird things about different cultures.