I personally find clear, plastic transfer tapes to be the easiest to work with. In general, I find plastic tapes to be more flexible and less likely to wrinkle when applying a decal. Clear tapes also make it easier for you to see your decal as you position it on your project. These are my favorite transfer tapes and the ones that I repeatedly reach for:

First, my very favorites are the clear transfer tapes from HeYi Vinyl. I use both the regular clear and the grid transfer tape, and both work wonderfully. I like that these rolls do not have a paper backing, so I can just peel it off the roll and straight onto my project. These clear tapes are also a great option because of their incredible value. You will last FOREVER.

My second-place choice is my Silhouette Transfer Tape. It is crystal clear and works beautifully. The only reason it only made second place on my list is that it does come with a paper backing, which feels a little unnecessary to me.