Know your limits
Look, I think responsible use of pot is fine. If you're using it for artistic reasons I think it's okay. But if you're relying on the 'drug' then you have a problem.
Use it, don't abuse it. I've seen friends turn into stoners simply because they let the 'drug' take over them. But I've smoked pot in various scenarios, learning from each experience. It allows you to open your mind and think outside the box. I only use it when I'm not driving. When used properly it's a wonderful thing.