I am sure that others have noticed the same things that I have noticed. If you are DPS, you can usually get away with not knowing your asshole from you elbow. The obvious exception is tough progession fights.
This has never been more evident to me than since the time I got my Ret Pally to 80. As a tank, I am always aware of my surroundings. I notice mobs running towards healers or dps and swiftly taunt or intervene. I see all of the bad shit on the ground and easily move myself out of the void zone just waiting to swallow me. I can do the Heigan Dance with no issues walking backwards.
When it comes to DPS, I usually do an ostrich...except instead of sticking my head in the ground, it goes straight up my ass.
I dont know what it is, but taking the burden off of a tank or healer and having them DPS can make them become instant retards (myself included). Put me in a raid as a tank or healer and I will be a superstar. Put me in as DPS and I will probably get myself killed repeatedly.
A Sarth 25 Pug I did last night made me realize just how lazy I get when I am just DPSing. I died to a void zone on the first drake. I NEVER die to void zones. Then on Sarth I died a horrible death after getting hit by a lava wave (/shame) and getting pulverized by a rogue (enraged) elemental.
I really does get embarrasing. Sure I can put out decent DPS for my gear, but give me a two hander instead of a sword and board, and I become a kamikaze goat demon.
I have come to the conclusion that DPSing after tanking or healing for so long makes you so much dumber.....and being dumb never felt so good :)