My first "serious" RPG was FF7. Prior to that, the only other RPG I've played was Super Mario RPG: Legend of the Seven Stars and a barely-working copy of Ultima III: Exodus' NES port. I only grew up with the genre in very small doses until I discovered emulation (and getting a job to actually buy games).
The latter always fascinated me as a child, even after playing FF7. While FF7 opened my eyes to just how cool RPGs can
look, the simple ability to create your own characters and party in Ultima III resonated with me showing me how fun RPGs can
play. From then, I always felt pretty damn biased towards games with even the smallest amount of customization and freedom. From the day I discovered emulation to catch up on titles I missed out on, I grew only more attached to the likes of Dragon Quest III and Wizardry 6-8 (and later SMT) where it's all about building your own party and occasionally letting you choose how the game plays out. Call it a bizarre preference, but when I have a chance to create and add an
overweight gnome obsessed with darkness to my party over Troubled Bishonen #141 forcing his sob story down our throats, I'll take it. I only jumped on FFXI later simply because I thought at the time that the
"red mages in the old games were really cool looking."
As for FF7... Final Fantasy has always been something of a overly dramatic and artsy adventure ever since they thought killing off every living person was a good idea in FF2. FF7 didn't really innovate in the realm of gameplay (the entire series is solid, the battle and growth systems of each game still holds up to this day) but further strengthened itself in telling the stories FF was famous for, where graphics and presentation actually can add a lot. A 4-disc game tends to leave you with a lot more time for character development. This isn't to say stories in past games like FF6 are automatically inferior, but FF7 took the level of presentation and went full throttle with it.
edit: holy ***tl;dr: FF7 was a pretty game and prettiness/presentation can be good for story-centric RPGs