Keep in mind that the standing and walking animations really tell the player a lot about the character. So don't try to come up with a generic or even just a "cool" pose - if you have a good idea of who this character is, you'll make a much better animation.
A sort of cold, callous character probably isn't going to move around very much, but he'll have his hands in a position where he can defend himself because he doesn't trust anyone.
A confident, arrogant character will probably have his arms at his sides or even in his pockets 'cuz he's not afraid of being attacked.
An edgy, psychotic or excitable character is gonna be bouncing up and down on his toes just waiting to take off, wasting lots of energy because he has plenty to spare
etc, etc.
If you look at SNK's fighting games I think they do a better job of this than Capcom... although later Capcom games like Street Fighter 3 and Marvel vs. Capcom are better.
Professional animators usually have an easy time creating poses because they have writers who have already described the character's personality to them in great detail. If you're having a hard time coming up with poses just take a minute and put yourself in the character's head.