The original Weis & Hickman Dragonlance trilogies were probably the first "adult" fiction I ever read. I loved non-fiction as a kid, and was reading high-school level books on astronomy and spaceflight in first and second grade, but hated the fiction we were assigned at that level. The only fiction I read before Dragonlance were Choose Your Own Adventure books.
I read Dragonlance around the same time I learned to play D&D and discovered the SSI D&D games for Commodore 64 (sixth grade). When I look back on those and other Weis/Hickman series, I realize they're not great literature, but I'm still grateful for spurring a love of genre fiction and gaming in me.
No other game fiction has ever really appealed to me. I immensely disliked Salvatore's Forgotten Realms books, and the only Magic: the Gathering book I tried to read (it came free with a starter pack of cards) was so bad I threw it against the wall 4 pages in. I read the first two Vampire: the Requiem novels. They weren't great, but better than I thought they'd be. Now there's just so many novels for so many properties, and I have so many other books to read, I don't dare to start anywhere. I don't get enthralled with the settings or characters of most games. I rarely spend more than a week or two on a game; why would I want something that short fleshed out? At least with a pen & paper RPG or LARP, I spend months or years playing the setting. This is part of the reason that Dragon Age are the only video game-based novels that kind of interest me at the moment.