If I were getting a tv primarily for gaming, I would probably lean towards a LCD/LED set.
With plasmas, you have to be a bit cautious for the first 100-200 hours with static images and 4:3 or widescreen bars to avoid IR. After that, you're generally fine. However, if you're gaming for hours on end, then I lean towards LCD/LED sets to avoid the possibility altogether. I occasionally game on my PS3 and Xbox 360, but I primarily watch blu rays and hi-def cable, so I wanted Plasma for the 'superior' image quality. If I gamed most of the time, I would personally get an LCD/LED. Just my 2 cents..
Room1:Panasonic 65VT60/Yamaha A1010/Denon DBT1713/Definitive BP8, CLR2300, SM350/Martin Logan Dynamo1000
Room2:Samsung 64D8000/Yamaha A730/Definitive BP8040, BP6, Mythos 3/PS3, Xbox 360
Office:Audioengine N22/Fiio D3 DAC/Athena P5/Polk PSW10
Car:Acura ELS DVD-audio/Focal