I prefer some type of attractant on the soft plastics I buy. I usually cook some in or add later to the plastics I shoot myself.
I like the garlic or the anise from Bang quite a bit. Use some of the Smelly Jelly stuff too. I like the Hog Tonic garlic but it seems to fade out quicker scent wise.
I wish I knew what Beast Coast uses on their newer plastics as it's the best I have seen. I tried to make a homemade version of it without much success.