LCD flaws:
-lottery dependant uniformity of brightness, black levels and colours
-backlight bleed ^
-greyish blacks^
-black crush (VA)
-IPS glow (IPS)
-blurry motion
-up to 100ms response time for white-black transitions^
Plasma flaws:
-no 10-bit colour?
-flickering
-phosphor afterglow
-buzzing sound
Can't say I have had any of them on either Plasma or LCD screens tbh....