I've got about 2000 hours dual given. I'm sure there are people here with much more, but just saying I've got some qualifications.

You will learn the most from your primary students (instrument students are second, then multi, then commercial. I have a fair amount of sea, glider, tailwheel, etc. that I'm not talking about in this post, just the 'big four.')

Most instructors I've known have said they enjoy advanced instruction more than primary, and to an extent I can understand that. Primary instruction can be incredibly more frustrating that other types. It also can be the most rewarding type of instruction by far. The moments that you'll look back on with the most fondness will likely be with a primary students, because with none of the others do you get that moment where they suddenly 'get it.' It's a wonderful feeling, and will leave you feeling good for the rest of the day.

If you've made the decision to flight instruct, I *really* think you'll be doing yourself a disservice by trying to skip primary students. You'll also likely find some resentment from pilots and other instructors. My $.02.