Here is my list, from the one I like the most to the one I like the less
1. Cow (It's first on the list really only because it is the creature I'm most used with. I picked it since the game is released and for some reason, it's the creature I most love to use since then.)
2. Leopard (Most listening creature I ever had and a perfect defender, plus its speed.)
3. Gorilla (Same reasons as the leopard, just not as fast.)
4. Horse (Best choice for a 100% benevolent god, which I am.)
5. Zebra (Same reasons as the horse, but unicorns rock more!)
6. Sheep (If not for the reasons I wrote, this is where the cow would be, and I don't know which would be above. Extremely loyal creature and looks awesome when 100% good.)
7. Chimp (Fastest learner... 'nuff said.)
8. Ape (Second fastest learner as a starting creature... and gives access to the chimp.)
9. Lion (I find it best suited for evil gods, but a high strenght paired with high learning speed is not to be underestimated.)
10. Brown Bear (Best fighter and isn't stubborn.)
11. Polar Bear (Just like the brown bear. Consider it a tie between those two fellas.)
12. Turtle (Although it requires a little more supervision in the beginning, it's an overall awesome creature.)
13. Mandrill (Easy to craft at your preferences. Fights okay, learns okay, looks okay... Comparable to a Washburn XM guitar, fits any style without being too special.)
14. Wolf (It may be just me or I was unlucky every time I tried it, but I never found anything special about it except how he looks when 100% good... which I hate. Despite that, I'd compare it to a Kramer guitar: good... but overestimated in my opinion.)
15. Tiger (If only it would've understood from the endless slaps I ended up giving him as a result of losing my patience and giving up my sanity trying to tell him not to do something or another... Although sometimes when I picked it it decided to listen to me without too much trouble, 89% of my tests with it, it would just end up being the most stubborn creature in the entire game, period. Not to mention he's the slowest learner...)
I'll list the CI only creatures apart because they're only playable in CI (yup, who would've guessed, haha).
1. Chicken (A mandrill specwise with a horse mindset (I'm not sure about the latter characteristic, but everytime I tested it it seemed to be that way and it's a little too far in my memory to tell if it was because of how I train my creatures or if it actually is that way). A custom guitar for benevolent gods.)
2. Rhino (I didn't test that one as many times as the other creatures, but from what I remember... uglier than the wolf at 100% good and also dumber. I didn't like it very much.)
3. Crocodile (I seriously wanted it to be at the first position, he looks so awesome and his dance is so metal :yourock: that if he would've moved as fluidly as any other creature in B&W, he would have been. But unfortunately, it is not the case. His moves are broken... Nearly unusable... ...yup... ...I'm sad right now...)
So yup, that was my list, from my favorite creature to my less favorite
P.S.: Just to prevent a useless debate, please note that this listing is based upon my experience throughout the tests I made in my games for my style of playing and MY way to educate each and individual creature. That means that you might adore a creature that I dislike, and that's what makes this game awesome
Don't forget that it only is and will always be a personal taste