I can definitely lose myself in the flow of accomplishing a workout the same as I used to playing sports.
I also usually like the feeling of being a little sore/achy knowing I did something worth doing that day.
I like the feeling of not being winded walking up stairs and feeling like I can carry all the weight without much effort.
I like eating a pile of food knowing my body needs to eat because it had to work.
Somedays though, working out and all the rest of it just sucks.