I have a very (perhaps overly) simplistic definition of a workaholic. If your work is the most important thing in your life, you qualify as a workaholic. If you put your profession before family, friends, spouse, children, etc., you are a workaholic. There are times when it's advantageous, even healthy to be a workaholic, but only as a phase -- not a lifestyle, at least IMHO. I have very strong workaholic tendencies myself, and struggle with tempering that behavior.