Los santos Part 1 is ok.
Badlands are great one of my favorites
Fierro-The jizzy strand blows. So i hate Fierro
]The desert is alright
Venturas] is alright
Santos Part 2 ownz

Los Santos 1: 3/5
Badlands: 4/5
San Fierro: 1/5
The Desert: 5/5, they have the coolest missions.
Venturras: 3/5, only one really fun one.
Los Santos 2: 3/5, only one fun mission, and thats the one where you help Cesar.

Badlands are great, I Like the first mission.