So a friend of mine likes to give me recommendations for books, games and music he likes. Sometimes I really love the things he recommends, and sometimes I don't.
The problem is that often he won't take 'I don't like it' or 'It doesn't grab my interest' for an answer, and then he'll keep pressing me. For example, he recently recommended a computer game which I didn't think I'd like. And every few days he would ask me again 'have you played that game yet?' Eventually I caved and bought the game, played it for about fifteen minutes and decided I didn't like it. It actually irritated me, partly because of the game itself but also because I felt like I'd been given a homework assignment to do instead of a fun thing.
The next time he asked, I told him the things I didn't like, and said I wasn't interested in continuing to play it. He emailed me back telling me that I hadn't given the game a fair chance, and argued with me that I was wrong and that he would 'help me' get through the difficult parts.
And that if, after he 'helps me' I still don't like it, then it would be my loss.
I know he's going to raise the subject again. I'd really like some polite phrases to communicate that I'm not interested in it, and that I don't believe that it's a failing on my part that I don't like something that he enjoys. Everything I think of comes across as rude.