Why is it that my sandwich meat never tastes as good as when I get deli sandwiches?

Everytime I get sandwich meat, even when it's from a deli, it never tastes as good as when it does when I get a sandwich from a deli. I got some turkey to make a sandwich today and tasted plasticy and weird, and was also kind of wet for some reason. I tried using a paper towel to absorb some moisture, but it didn't seem to get any less wet. Am I just getting bad meat or something?

Edit: I made another sandwich following your guys advice and it tasted waaaay better than the crappy sandwich I made the other day, thank you all so much for the tips!