Oh and before I forget, the masking tape I use is from the dollar store. Can't beat that for price and I actually prefer it because it's thinner than any heavy duty stuff..
I use it in lieu of washi tape. (Love washi tape but I just don't own any right now!). I lay down strips of plain tape and then I paint it with acrylic paint or mist and then use my stamps on it.
My favorite use of it is to add texture! I prefer to crumple and fold it as I lay it down. Then I gesso over it and add my paints, mists, crayons.
On my most recent layout I used it to make an embellishment. I wanted to make a striped hot air balloon so I prepared my masking tape with pink paint and checkered stamps. Next I laid down the painted masking tape with stickers in a stripe pattern onto cardstock, cut out a semi circle, and I had my "balloon".
Here's the left overs after I'd cut the semi circle (sorry about the poor picture..took it at night!).
Hope that was helpful! Leave a link if you make something, I'd love to see it:)