Lightning Bolts 6 - You mean you don't play D&D to exploit your advanced knowledge of geometry and trigonometry?
Polymorph 2 - Remember those eggs in Heretic that would turn enemies into chickens? Good times.
Wonder 17 - Every day I flip through the pages and think "well, I guess today's the day I finally have to upvote Wand of Wonder" and yet it always comes back with a vengeance. I don't think I've upvoted it once, despite it being my top choice by far from the beginning.
Edit: Fouled up the upvote again