Well, for my all-time favourite fighter I'm going to have to go with the Ferret. It's just awesome.
Now for my love/hate list for every game!
WC1: Love: Raptor Hate: None, they were all good ships.
WC2: Love: Ferret!! Hate: SABRE! WTF? You call THAT popcan a heavy fighter??
WC3: Haven't gotten my hands on it.
WC4: Love: Banshee - it feels like the old Ferrets! Hate: Hellcat V. How can ANYBODY love this piece of crap?!
WCP: Love: Vampire, obviously. Hate: Stock Devastator. Yeccch.
WC Armada: Love: Phantom. Ferret on STEROIDS. More of a "medium-light" but it's the best interceptor Confed ever built. Why the HELL were these not in WC3? Hate: None, really. The heavies were fun...flying gun platforms.
Privateer: Love: Galaxy - it's just got that Millenium Falcon feel. Hate: Tarsus, aka flying coffin.