TI-82, TI-83, TI-85, and TI-92 here (I hacked on TI calcs back in the day; it's how I learned assembly).
I also own a HP-48gxc and a HP-12c Platinum. Carry the Platinum with me every day, everywhere I go. RPN > ALG; this is especially true for doing complicated calculations.
Cheers,
-Andrew