FF7 because..
It's got an amazing story line, a lot of fun, sad, amazing, cool parts. The story is just amazing in many ways, it's hard to describe how much I love it.. sometimes I end up having crazy dreams being in certain parts of the story line, like when tifa and cloud fell in the lifestream and tried to figure out who he really was, I had a dream being in there once.. xD and other places.
The music is just perfect for my ears, I listen to it almost everyday, if it wasn't for the songs it has now, it wouldn't have been a perfect FF for me.
The characters are awesome, Cloud and Sephiroth make a perfect hero and villan with their personality/looks/weapons, and the turks, the party members, they're all so awesome ;-;
more to write but there's my why.
FF8 because..
The story was pretty awesome as well, I preferred FF7's, but this one was great too. unfortunately I couldn't beat the final boss though, since I couldn't get the ultimate weapon, I kinda suck when it comes to searching craft materials to craft something ._. So I was going around with average/semi best weapons, not ultimate x.x
I love the music from FF8 too, I hear it a lot as well, not almost daily like 7, but close. FF8 music is also perfect to me.
The characters well xD yeah, awesome, but I don't like ultimecia, she's got such amazing power, I admit she could own Sephiroth, maybe if she stopped time or something, but witches aren't my thing xD Squall was an amazing main character, his gun blade is awesome and I'm not sure which is better between the buster sword or the gun blade.. but if I had to pick one to have irl, it would be the gun blade, because I can't carry the buster sword xD while the gun blade is one of the best small swords out there, awesome details. Irvine was one of my favorite characters too, using him like in the prison running in circles was awesome, he could've done a great main character in my opinion as well. :3 I never thought of that with anyone else in FF7, so props to him xD