Nothing about 5/4 is fun. 7/4 / 7/8 is fun because I can feel it, don't have to think about it too much, and can improvise with it without problems. 5/4 is from the pits of hell, it doesn't feel good, I have to consciously count the whole time, and I'm convinced people do it just to be assholes.
Looking at you, Sting.