Ashley - 3 ( she is really a filler in a team in my opinion, if you aren't playing as soldier )
Kaiden - 5 ( good side story )
Wrex - 6 ( for his sense of humor )
Garrus - 7 ( cool attitude against Shepard, easy going/spicy jokes )
Tali - 10 ( greatest character in ME series, for overall personality, story, attitude )
Liara - 5 ( she had a nice personality, but she lost much in my eyes when she began killing for revenge )
Miranda - 5 ( she may sem to be the ME2 LI suggestion from game developers, but her femme fatale style don't hit the spot )
Jacob - 7 ( loyal, experienced, also has a cool personality, could easily take Garrus'es place in crew, if it was needed OFC )
Mordin - 10 ( my second favourite, regardless of his killer attitude, he is very funny and trustworthy character )
Grunt - 6 ( he is nice when comes to the fight, but i liked Wrex much more )
Jack - 5 ( another unnecessary straight-biotic character, but deserves justice )
Thane - 7 ( good story, adds much more soul to the game )
Samara - 7 ( one of most loyal, and has unbroken will - exceptional underling

)
Morinth - 6 ( just a substitute for Samara, but is a nice addition as Samara's nemesis )
Legion - 9 ( at least something - ok someone, who shows the other side of the Morning War story, a prophet of peace between Quarians and Geth )
Zaeed - 1 ( worse dlc I ever saw, really brings nothing to the story, actually made him loyal only because wanted to keep other crew members alive during suicide mission )
My judgements may seem too much emotional to you, but I cannot describe it any better way than if i were Shepard for real. XD