I was a little surprised to read some of the answers. I don't know why, but I just envisioned most of you growers standing on a short ladder to pick your crops...but upon reflection, I see that by your postings that a shorter tree height is far easier to deal with.
I set my height limit to about 7-8 ft total, but try to keep the bearing branches within easy reach...and all my trees are trained into single-stem standards, with a nice rack of branches growing on top of a clear stem. Any branches that sprout along my clear trunks, becomes cutting material. I found that trees growing in this style, are very easy to train, maintain, and easy to store.
Thanks for the replies and information.
Frank