Nomad, because they are very social, a big family with big hearts and probably the last free people in 2077.
At first I wanted to be a Corpo, but they come across as a bunch of mean egoists, are all alone in their concrete towers, hated by the people and eventually get backstabbed by their own colleagues. They're rotten individuals with a lot of money. And we all know that at some point we're going to lose all that money and implants we start with. What are we left with then? A bad personality?
I also find it way more interesting to start at zero and work my way to the top. Returning to the top as a Corpo somehow doesn't have the same feeling of achievement to it, because you return to where you began. That's just my opinion, of course.
From reading the Lore Book which obviously this is not a spoiler but, there are different ranks of Corpo. The "Dominated" are the lowest of the low security, drivers, cleaners and so on. There are mid level and then the CEOS, execs, and top dogs. According to the Lore there are normal every day people that work corpo because of the corpo benefits living conditions and so on doesn't mean you have to have a bad attitude just cause your labeled a corpo. They do there job and go home like normal people and the other guys well I think we all know how to move up the Corpo ladder.
By any means necessary.