Yes, I definitely like that tilted head look. I think I like the one on the left more, with the small line for the mouth. But I also like the nose of the one on the right more.
This isn't so much a suggestion as pointing out something - the bear on the right, her/his smaller eye is slightly blurred, making it look almost square. Have you thought about taking his eyes in that direction?
I know you said you didn't want to put too much detail into the bear yet, but I want to make a comment on the shading, anyways. I think it would really benefit the picture if you applied some dithering. I'm still quite a novice with pixel art, so I don't know if dithering is general avoided or what, but I think the shading you have is a little too solid, and dithering is the only technique I know as of now that combats that. You may have already been thinking of doing it, but just in case, I thought I'd suggest it. Here's an edit I did, with some dithering applied (though not very skillfully), along with an edit to the nose, making it a copy of the bear on the right's nose.
And yes, you should probably switch your image file to .png or .gif.


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I don\'t like signatures. You try and think for hours of a witty one-liner to put in that won\'t be over-used or annoying, but nothing comes to mind. But what else is there than to put some sappy song lyrics or a huge picture? Nothing. So instead, I\'ll just write about hating signatures.