Mark,
I spent 9 years in corporate charter, which is close to corporate, but with some BIG differences.
As far as the work goes, it was fantastic. I''ve been from gravel strips in the arctic to central Mexico, and virtually everywhere in between. The job is very challenging, and also very rewarding. No, you won''t fly as much as an airline pilot, but an airline pilot won''t do or see half the things you will.
The down side? As a charter provider, you are on call. After 9 years of having a pager welded to my hip, it was time for a change. With a new family, it was time for something with a schedule, so I''m now at an airline, and loving it, but I DO miss the flying that I used to do.
Your traditional corporate operation will have more schedule, and less on call stuff. The guys I know in corporate might get 1-2 short notice trips a year. As for variety, it really depends on the company. Many simply run an in-house sched, with very few differnet destinations, others are all over the world.
Hope this helps, and good luck.