When I was in High School I fancied myself some sort of contemporary-hippie and enjoyed the concept of being a "pot-afficianado". Now, on the rare occasion that I cross paths with a spliff I just feel drained and de-energized. It's more important for me to pay attention to my kids on the rare occasion that I'm not at work than it is to sit on the couch feeling a lack of motivation to do anything.
That said- the way I feel about pot is if it's your thing, it's cool. I AM a supporter of legalization.
If it's not your thing, however, and you smoke just because someone else is doing it... well... that's kind of moronic, IMO.