Eh short compared to what? It is at least longer than most movies (assuming you aren't watching a trilogy in a row), and about the same cost. I do think I will replay it at some point too.
If I recall right the chances of actually meeting another person in the game is pretty slim. and it's also not necessary to follow them. You could happen to see someone and then carry about your business.
On days where I feel like things aren't doing so well, or if I'm stress out I'll turn on Flower or Cloud. Sometimes I'll play flOw but I find it less relaxing than the other two.