Do you use SAS or STATA? Why? I use SAS, and am (a) an experimentalist, and (b) old. Are those the relevant variables? Are there substantive differences in which is best for certain tasks, or is it just a matter of familiarity?

Do they play well together? Does anyone use them both in sequence (e.g., one for data manipulation, the other for statistics)?

What would you recommend to a doctoral student today?