My rating scale is completely arbitrary, as you will soon learn, but I think it does the job :)
Best of the Best
Fresh Supernova (Sephora)
This is my favorite mascara. It has an amazing brush, that lengthens & thickens, it lasts a long time before drying out, and it is also so good for applying multiple coats, something a lot of mascaras lack. The nice thing about this brand is that they have a mini 2-pack (Supernova + Firebird, which is good, not great) so you can try it out first, though I doubt you'll need to!
Best
Covergirl Lash Blast Fusion (Shoppers, etc...)
This mascara is certainly the best value out of all of these mascaras. It does everything it touts, and it is what I am currently using!!
Dior Diorshow (Sephora, The Bay)
Yes, this mascara is as good as they say. The only negative I find is that sometimes it flakes off during the day (or night), so keep an eye out for that!!
Worst
Any Clinique Mascara (it pains me to say this, and it is not a reflection of their other products, which I enjoy)
I have never been impressed by their mascara, it just doesn't seem to do anything but darken my lashes. I always try and give it another go (my mom always has their free samples), but just can't do it!
Sephora Collection Triple Action
Just not good. And it smells weird.
The Best of the Rest
Benefit BADgal Lash (Sephora, The Bay, Shopper's)
Korres Deep Color Mascara (Sephora)
If your favorite mascara isn't on this list, let me know, I'll never give up my search!