If you really love fireworks, the best place to find those is.....in Orlando. I'm like you. I LOVE Disney fireworks. No one does it better. But in Orlando, you get MK fireworks nightly, Epcot Illuminations nightly, Hollywood Studios Fantasmic! nightly, and now even AK has a light show similar to World of Color. I did 7 big trips over a 10 year span, and firework
At DL, it's very limited. You get fireworks nightly during the summer months and then from Veterans Day to New Years (Christmas version). The rest of the year, you only get it on the weekends. And even then, I can't tell you how many times we've waited waited waited for the fireworks to start, only to be told on the overhead that they'd been cancelled due to high winds. It's really disappointing when that happens. Especially when they only show it a few times a week.
As for F!, you'll love the show. But you'll have to shell out the cash and get a dining package if you want to sit down. Otherwise, you'll stand in line, shuffle to your lousy spot, stand for 30 minutes waiting (and elbowing sneaky people), and then standing for the 30 minute show. Total Disney cash grab, but it's the only way it's worth it.