Please tell me which one looks best, i just started making avatars like this.

1)
[IMG]https://i907.photobucke*****m/albums/ac273/Lil_Shorty_B/GhostCloudyGFXv2300x300.jpg[/IMG]

2)
[IMG]https://i907.photobucke*****m/albums/ac273/Lil_Shorty_B/GhostCloudavatarGFX300x300.jpg[/IMG]

3)
[IMG]https://i907.photobucke*****m/albums/ac273/Lil_Shorty_B/Helicoptersmokeghostavatar300x300r.jpg[/IMG]

4)
[IMG]https://i907.photobucke*****m/albums/ac273/Lil_Shorty_B/Ghost300x300avatar-1.jpg[/IMG]