At less 10 of them not counting godzilla cause he's everyone favorite but I'll say what is my favorite version of Godzilla is Final Wars and Legendary

Here is the 10 in not particular order:

10- Mothra

9- Biollante

8- Monster X/Keizer Ghidorah

7- G-Force MechaGodzilla/ MechaGodzilla 2

6- Gorosaurus

5- SpaceGodzilla

4- Titanosaurus

3- Kiryu

2- King Kong

1- Mecha Ghidorah