Hmmm...
I would have to say "It Depends"...
I voted "I've Got Game", but that comes from a blending of DM and Player rankings

! Armchair General since 1974...countless hours of Panzerblitz, Squad Leader, Caesar's Alesia and WSIM...West Point...Army Officer...Player/DM since 1981...hopefully all of that hasn't gone to waste

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As DM
I would place myself near the top for any regular campaign session. Most monster/NPCs encounters - even some rated as fairly easy - can quickly turn into TPKs or TPCs (total party captures) if played to the best of
my ability. Ambush, feigned retreat, playing dead, concentrated firepower, hit and run, feigned surrender, traitorous mole/turncoat, flanking manuevers, continual harrassment, divide and conquer, psyops, framing for crimes, maximizing critter abilities/strengths while protecting critter weaknesses/liabilities...all the fun stuff.
I do my best to temper this and play creatures true to their nature and/or intelligence. Chaotic and less intelligent critters make mistakes (or, more importantly,
don't exploit PC mistakes), smart guys can get over confident and make sub-optimal decisions, etc. However, if PCs drop their pants in front of the wrong opponents (smart & well-trained), the result isn't pretty.
I don't do quite as well with 1-shots and tend to pull my tactical punches a bit because I am often DMing folks I have never met before.
As a Player
This brings my average down...particularly if I am playing a PC I am unfamiliar with or a system I am not well-versed in. I did a 1-shot with PKitty's group as Priggle (and Burr-Lipp, when Priggle got mindblasted) that ranks up there in my 5 all-time uninspired RPing moments - mainly because I kept missing entries on the PC sheet that were in plain view. Fortunately, Kevin still talks to me

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The flip side is when I am playing a smart, tactically oriented PC, because I can turn into a linear plotting DM's worst nightmare. I think big and outside the box. Sun Tzu kicks in and its all about matching strengths to enemy weaknesses while avoiding the enemy's strength.
I look forward to matching tactical wits with Rel and Henry at NC Game Day VII in a few weeks...
~ OO