When you hit a stage in your life like you have. You ask yourself a question, what am I smoking for? Alot of the times people get stumped, others just shrug it off and say to get high. I was using it as a pain killer for my bad back, and as a way to cure night terrors(nightmares), thus helping with insomnea. Now I have no trouble sleeping and I'm perfectly fine.

You either:
Have ailments in your body/mind.
Just wanna get high.
Do it for the fuck of it (at parties while drinking, and such)
To try and make something extra fun. (Much like the way you plan to use it.)

I like the idea of using it so you'll remember something as "remember that time we got so ripped and...". It also helps give your lungs a rest (if smoker). Mind a rest, as well as make it more potent. I'm an avid fan of taking a break from weed.