Krissy and Vivi22 miss something though, the first part of AC04 Distant Thunder's final level that dogfight was intense as smurf, doing it in any other jet than the SU-37 made for an interesting time, doing so on Ace difficulty made it nigh on impossible though I once attempted it in the F-16C on Ace difficulty and somehow survived.

AC06 was pretty cool, though the final level was much more like the second part of the finale from AC04. Lots of low alt stunt flying through tunnels and ground targets, there was however a complete navy, enough anti-air guns to trout up anyone and even some you can't even target until 75% of the way through the mission despite having to pass between them (makes Ace difficulty extremely interesting must be said, 3 hits and you're downed and you've got a passage of 8 anti-air guns what you can't silence)

Aside from Ace Combat bosses/final levels, Halo's final level always amused me as did of course Halo 3's since it's pretty similar, nothing quite like a flat out race against the clock for a change of pace in a shooting game. Mass Effect 2's suicide run mission is great. Psycho Mantis was always going to be mentioned. Whilst probably not a great boss fight some of the most fun boss fights I've played are when myself and Psy did Resident Evil 5 on Professional difficulty deserve honorable mentions as whilst infuriating we did have a laugh with it too.