Mine go:
1) Wing Commander battle between the TigerClaw and the Kilrathi Cap ships.
(from a Tactical standpoint it was rather interesting. The whole theres still hope thing.."Give them a BROAD SIDE MR GEROLAD!"
)
2) Episode 3 the beginning battle. (nuf said)
3) BSG attack on the reserection ship and the escape from New Caprica.
(I loved the suspense from the reserection attack, and the sadness from the loss of the beast)
4) The Last Star Fighter. When the death blosum is fired. (thats just freekin cool.)