Probably due to my passion for drama/tragedy. I like finding buried treasures under the wave of popular animes a la Attack on Titan or SAO, or you name it. At some point a few years ago, I watched CLANNAD. While the characters and routes were pretty entertaining, it didn't rank up to my favourite animes/games in any way (I only really cried at Fuuko's route).
But I started really getting into Key back in 2012 when the first episode of the Little Busters Anime was airing. Some friend who tried it out yelled at me that there was a character that looked a lot like me, and not just physically, so I went to check it out and found a liking to said character and the childhood friends.
I started following the anime, though at some point before Komari's route I dropped the anime and decided to go for the visual novel since it had one with a full English translation and I was tired of waiting on a per-week basis (yes, I'm impatient, lol).
Fun fact: When I played the visual novel, I had no idea Little Busters was a Key work. I only realised it after Komari's route.
I really lost it and gained utmost respect for Key at the end of the Refrain route. That route alone made Little Busters climb up to one of my favourite animes/games. So I started looking at other Key works since I liked LB and Clannad and wanted to try out the rest of their works (mostly Maeda's though) .