After opening these 10k cases, here are the results I got :
Common : 6185 (61,85%)
Uncommon : 3035 (30,35%)
Rare : 687 (6,87%)
Epic : 87 (0,87%)
Legendary : 4 (0,04%)
Mythic : 2 (0,02%)
I think I'm quite lucky.
Now, try writing your opinion in the comment.