My $0.00002 of personal opinion...
if you're still young, I would say don't slack off in your career AND education.
yes, you'll have a good time now, and probably make enough for you to spend (and then a little bit left...)
but what you need to look into is the future.
I think a normal path for a guy (or even a woman) is to get married, have kid(s) and so on.
in this society, although you are not necessary to completely supply for your girl / wife / kids... it is pretty normal for the family to "lean" on the "man of the house"... the husband...
you don't need a well pay job now, but you do need to be good at something that can make money...
it can be design, programming... ebaying... selling...
but I think watching movie / playing video game / ... etc doesn't really fall into category.
imagine, 10 yrs from now, can you still do this job ?? More realisitcally, do your employer still wants you ?? If there is no skill required, why not hire a even cheaper college dropout at that time (young and strong)

why still keep you ??
and if they don't keep you ?? Can you still make a living which is same or better than now ??
well... of course, there's no guarantee (even if you're good at something...) but I still think having sort of a "plan" is better than none.
you can call me navie, but I believe that if you work hard, in the long run, in life's own strange way, it'll pay off.
