Hands down, Ulta Professional - Revved Up Red. I bought this (in Ulta...no way!) for .99 during the after the holidays mark-downs.
I have about a dozen bright blood reds, but this one takes the cake! 2 coats for opaque, and it's super shiny without a top coat, it dries fast, and doesn't stain with removal. The color is so bright and pretty! A true definition of red.
Which red is your favorite?
And from a few months ago when my nails were nice and long: