i've been a PC gamer for over 20 years and i never understood the appeal of gaming on a laptop.
there are just too many cons in my opinion:
smaller screens - or do you have a 24" laptop?
weaker hardware compared to desktop counterparts - gotta save those Watts.
low bang/buck - for the same budget you can usually build a better desktop.
not upgradable - how do you upgrade the most important part fro gaming: the video card?
always plugged in - if you run out of battery very fast when you game without a power cord, just get a desktop instead.
no getting your hands dirty - i like assembling desktop systems, makes me feel like a Man.
if you're the sort of person who really can't stand not gaming when you're out of the house for a couple of days, then MAYBE a laptop can be a solution.