Being able to enjoy doing things without knowing how much it costs.
It's not about being able to afford things. It's about me quantifying in my head the utility I get from the activity. If the purchase costs more than what I think I get from it, I don't buy it. I don't like surprises, so I research the crap out of everything I buy. This research stresses me out and takes away from the utility I get, making the experience less and less worth it. Often, the stress of researching is enough for me to give up on whatever plans I was making.
When it comes time to actually enjoy the experience, I'll just think, "this hour I'm here, that's $100. Did I get $100 of enjoyment from the last hour? No.. Now I'm upset I wasted my money and use that to justify not doing things in the future.
I miss being a kid. My dad did all that stuff and I just enjoyed.