When I was younger I was very adverse to watching Star Trek TOS, for the reasons of Star Wars, and having been spoiled with Star Trek TNG, not to mention having heard that TOS was shit compared to TNG. So a super nerdy friend of mine lent me the entirety TOS on VHS and I ended up marathon watching it. I got pestered into getting FTL, Minecraft, Shovel Knight, Papers Please, and Dark Souls by a friend over the last year. Ended up loving them all, though I've still only barely scratched the surface of Dark Souls.
I've convinced a stunning number of people to fall in love with Rain and Validation web comics.