How annoying! I do not respond well to pushy, insisting people; I get very stubborn, and sometimes I don't even want to try the thing they're pushing, even if it sounds like I might like it.
Depending on the nature of the relationship, I might say something like, "The more you push, the less likely I am to try it" in kind of a light, warning tone. Or, "You've mentioned that game/movie/book before, but I just don't have time to try it right now. I'll let you know if I do," followed by, "You keep asking me about that. I said I would let you know if I tried it. Could you not ask again?" in increasingly cool tones. I do think sometimes people don't realize how often they're mentioning something (or at least this is a charitable assumption) so saying something like, "You've mentioned that several times lately" might clue them in.
Also I would not give in to badgering, because that just encourages people to badger more. He makes a recommendation, you acknowledge it, now it's time for you to look into it further yourself and make your own decision, and you'll let him know if you actually try it. Maybe you could keep a list of his recommendations, or say that you're putting it on your Netflix queue/"to be considered" Amazon wishlist. Maybe that way he will feel like he's being "heard." But let him know that's the end of it, and he should not mention the thing again (to ask you about it, anyway).