[AE6]

"Filling up water bottles to the perfect height, screaming with every shot that goes in and always being optimistic are things that I pride myself on."

The structure here is kinda awkward, I think it would sound a lot better as "I pride myself on filling up water bottles, . . . . ." Also, there should be a comma after the word "in."

I like the theme a lot, but there's definitely a few more grammar/structure things like this that could use some work. Take it to your English teacher and ask him/her to have a look at it.