Fix "sleepy" eyes?

Hi! I'm just looking for some help with my fursuit eye shape. I always make a couple paper mockups while I'm furring and pick the one I like best, but it always seems like my fursuit eyes look "sleepy" (I've gotten a lot of people calling 'em stoned, haha).

I always like my mockup. Those eyes seem happy to me! But inevitably when I put the real eyes on, my character gets all dozy.

Here's a couple pictures:

http://imgur.com/8nPlum5
http://imgur.com/rWCdBFJ
http://imgur.com/zDFFbZl
http://imgur.com/n8Yclbc

Do you think it's the eye shape? The eyelid? I personally think it might be the length of the eye (kinda from the middle of the face to the temple, seems like I always make it super long), but I'm not sure. Maybe lifting the outer corner of the eye up a little would make them look more awake and cheerful? I can take pictures of my other heads if you'd like to see those too.

Please do not critique the head shape, as this particular head is a purchased head base. But if you see something I did totally out of line with the furring, feel free to let me know! My shaving isn't the best yet, so there are a couple rough spots.