I don't believe in trying to fit all my pictures into standard sizes such as 8x10, 11x14 etc. I know this isn't your original question but I'm getting to it. What I do is print an 8x10 and then decide which print size best represents my pre-visualization of the scene. If you take the same picture and make a series of prints 8x10, 11x14, 16x20, 20x30 etc you will find that one size seems to jump out at you and that is the ONLY size that neg should be printed to. The optimum size also doesn't have to fit one of these traditional sizes either.
Now for your question, do I print series of prints? No. I don't because if they are paying for a custom print, which is the only thing I do, then if you walk to back room and grab one off the shelf it just doesn't seem to have the same cache as one they have to wait a week for. I print to fill orders and for shows.
I also don't believe in the "limited edition" crap either. Printing hundreds of copies of the same neg doesn't seem to have hurt Adams for Newton any.