Minecraft. Even after they bought it for me, I still couldn't gring forth any motivation to boot it up. I played it with my friends for a bout a month, but it was more "my friends are online, I will too" and less "the game is fun and I want to play." Just never understood why I should pay for a box of digital legos that are annoying to put together when I have bins full of the plastic bricks.
Vindictus. It was free to play, and the same group of friends had gotten into it. I realized five hours in that it was the same dungeon over and over again but the baddies got larger health bars, and stopped playing. Rest of my group quit five months later, saying it was too grindy.
Dragon Age Inquisition. A different friend told me I HAD to get DA:I when it came out, and that it had a fantastic story. It was so cool, it was originally developed as an MMORPG and then made into a single player game (his words, negative for me). The tactical camera sucks on keyboard and is worse than Origin's combat, but the fighting's fun if you just run in without thinking too much (his words, knowing that I'm more of a fan of party RPGs having tactical combat). The next week, he praised how the game (read, the Hinterlands) had so much content, and he had spent 20 hours just in that one zone running around. The week after that, he talked about how the game was still fun despite the repetitive quests and numerous graphical glitches. See the pattern?
He stopped bugging me to buy it once I told him I wasn't a fan of warhammer fantasy's world, pointless fetch quests, or really the Dragon Age lore/story in general. I started playing Witcher 2 instead.
I've had three or four pairs of friends all try and get me into Dota 2. It's a game that I'm curious about, but I've never gotten interested enough to put more than three hours into it. I really enjoyed League, but a toxic roommate killed my enthusiasm for the standard MOBAsa. I've been meaning to get back into Smite since I hit 30 in the Beta, but I dunno if I'll go back to MOBAs.
In board games, I had friends try to get me to play Agricola. Most boring, overrated game I've ever played. Turns out, watching people do what you wanted with no ability to respond for two hours isn't enjoyable.