Being Batman

Being Batman is a serious job, hence the serious expression.

The positives:

You are Batman
You have a range of cars to drive and have a butler
You live in a large mansion
You live by a mysterious eastern philosophy

The negatives:

You've had a difficult struggle to become Batman
It's a 24/7 role
Your insurance premiums are huge
You get in to trouble for trashing things
You have some damp in the basement
Robin is a bit wearing after a while
You are forced to take yourself very seriously whilst at the same time wearing a cape and tight pants

Son #1 is not really keen on the responsibilities that come with being a superhero and is aware that the real Batman hasn't got a large bat painted on his forehead - that would be a bit of a giveaway