I've got one and you can omit the personalisation if that's what bothers you. I've opted for initials which is a good compromise. The ones handed out at T5 say Mini Adventurer, so I'm sure you can come up with other titles (Mr Trouble was another consideration...)
I'm quite happy with the backpack. It's his first, so I can imagine that if there were others in the household, we'd think twice before we bought him a new one...