I have a Sony GDM-FW900 (24" crt) and a Dell 1800FP, and i switch back and forth all the time. Typically for games that handle high res fine, i'll prefer the CRT simply because of the sheer size of it... but some games either don't support this resolution, or the resolution sucks (such as fonts become too small, or even the graphic itself gets 'warped' and stretch).
For games that i can't play at this high resolution (1920x1200), i definitely would rather play on the 1800FP rather than reduce the resolution on my CRT, or switching to my 19" CRT. Colors are more vibrant, easier on the eyes (even in games), and it's just more comfortable using an LCD, even for gaming. Personally for me, i've never noticed any sort of 'ghosting' or streaking or whatever people call it (i know the term ghosting that most people use is incorrect).