Took the kids to a theme park yesterday (still half term for us) and I was initially excited to go as I used to love them when I was younger, however I'm now over 40 and gained quite a bit of weight since last time I went to a theme park.
I felt wedged in seats, both ways, most seats seem to have a dividing bit in-between so I could just about get in, but then being jostled about and having to hug DD so she wasn't scared and not being able to hold the handlebars, I'm surprised I'm not covered in bruises today. 
I think even when I loose the weight, I don't think I would ever enjoy them as much as I used to, same with waterparks......