I have 100-200 regular star wars figures so I wont go into them.
But as for my Godzillas :D From the 1998 movie I got 12" living Godzilla, a different 12" raoring godzilla, 9" Godzilla, Godzilla piggy bank, Godzilla Puppet, remote control baby godzilla, 4 regular baby godzillas, a baby godzilla hatching, a godzilla pen, and adult godzilla and baby godzilla gumball dispencer, Ultimate Godzilla (he's damn big), a 3 inch godzilla in a fixed pose on a slab of destroyed road, and lastley for the 1998 film a 5" Godzilla that shoots a blue missile he goes very good with my bandai godzillas!
Now for my Godzilla classics I got 2 identical Ghidorahs and Mecha-Godzilla 2s, Super Mecha Godzilla, Mothra, Hedorah, 12" Kiryu (Mecha G 3), Anguiras, Godzilla 1954, Godzilla 1955, Godzilla 1968, Godzilla 1993, Godzilla 2000, Godzilla 2001, Godzilla 2004, Of coarse I have 2 9" imperial godzillas and 1 smaller version, Imperial King Kong, 9" Godzilla GMK, 12" Godzilla Final Wars, 12" Electronic Godzilla Final Wars, and finaly a 14" plush Godzilla 1985.
Alien: the space jockey, the first dude to get face hugged, 3 inch lego like alien, 6" mcfarlane Alien, MCfar 12" Alien, Neca 21" yes twenty one inch Alien, Neca Bobble head, 7 Face huggers ranging in size.
Aliens: 3" Alien Warrior, 3" Ripley, 3" Queen, 6" Mcfar Alien Warrior, Mcfar Hicks, Macfar Alien Queen, Queen Bobble Head, and a little and big version of the chick the gets chest bursted.
Alien 3: the Mcfar Dog Alien
Alien 4: mcfar Soldier Alien
Predator: Mcfar 6" and 12" Predator
Predator 2: Mcfar Predator the Hunter
AvP: Every Mcfarlane Diorama set, Celtic Predator, Scar Predator, Elder Predator, Grid Alien b4 it got gridded, Grid Alien, and 12" Grid Alien
AvP R: Warrior Alien, Pred Alien, 14" warrior alien and poseable face hugger (The best in my collection), Wolf Predator Unmasked, Predator masked, comic con excl Partialy cloaked Predator with face hugger and chestburster.
Aliens misc: a kenner alien queen from one of the comics, it'd have to be cause its tail is on its back and it has six arms rather than 4.