HP-85's are my favorite. A machine i had never
heard of 20 years ago.
It's odd, but the HP80 series are my least favourite of the HP desktops.
Far too much custom silicon for my taste, and an expansion bus that's
plain weird.
After the 9830, I think my favourites are the HP9000/200 series (HP9816,
9826, 9836, 9817, etc). Small-ish 68000 machines with a very good HP
technical BASIC (or UCSD Pascal).
-tony