Well, mines are in no particular order:
Godzilla from
Godzilla (1998)The Alien from the
Alien and
AvP saga, in all of its incarnations, except maybe for avpr's.
The Predator from the
Predator and
AvP films.
Graboid, Shriekers and Assblasters from the
Tremors Saga
Audrey II from the 1986 Musical interpretation of
Little Shop of HorrorsThe Rhedosaurus from
The Beast from 20.000 FathomsThe Bioraptors (or best known as Flying things) from
Pitch BlackThe Cockroach Monster from
Men in BlackMikey als from MIB
Biollante from
Godzilla Vs. BiollanteThe Kraken Monster from
Deep RisingPeter Benchley's Creature from the homonim film
The Moorwen from
OutlanderGwoemul from
The HostGodzilla from
Godzilla 2000Orga from
Godzilla 2000Draco from
DragonheartDragons from
Reign of FireVermithrax from
DragonslayerDoomhounds from
GhostbustersMore later!