I would almost say that my favorite video game would be FF7. It came out right around the time I started working, so I bought it and a playstation with pretty much my entire first paycheck. I couldn't even afford a memory card, so I ended up leaving it paused on the tv in my room when I went to school/work/or when I was doing stuff around the house. Counting two power outages, I probably played the first disc up to the fight with Jenova during the boat trip two and a half times before I got through, then I made it all the way to Nibelheim and made the mistake of opening the safe with a somewhat under leveled party. Ouch. I resigned myself to just playing the demos that came with the system until my next check when I could afford a memory card. I have a lot of fond memories of playing the game, like figuring out how to survive beta early so I could add it to my enemy skill collection. The music was perfect, and really delivered in the mood department. FF7 was the game that got me into rpgs.
Looking back, I'd could claim Morrowind as my all time favorite, based on the sheer number of hours my characters spent adventuring back and forth across Vvardenfell, but the end game started to drag a bit and seemed to streamline most characters into the typical warrior/mage/thief hybrid. It felt like you had so many choices, or at least the illusion of having so many choices, all along that it was almost like a bait and switch when the end game cropped up. It felt like the balance was obliterated. Either you had to sneak exceptionally well, or be able to drop three Ordinators at a time. One thing that was really impressive to me was that the game allowed you to break it from within. Soul trapping a Golden Saint and enchanting an object with a constant dispel effect sucked the challenge out like a hoover on amphetamines. I remember picking a fight with Vivec just to see if he would pose a challenge to my properly dispelled warrior-thief-mage. No such luck. The game, when properly abused, conveyed such a sense of being over powered that it was ridiculous. Water walking enchantment, hey, lets jog to Vivec. Levitation enchantment, okay, lets do a flyover of the whole island. I guess it did a really great job of letting the player feel godlike, but somehow it didn't stay as fun as it could have. Maybe it was my fault that the game became less and less fun. I got tired of levitation puzzles or annoying terrain issues, so I worked at magic until I could afford my levitation enchantments. I hate hearing my characters drown in games, so I held out for water breath or water walking enchantments. I got tired of cheap enemies (Ascended Sleepers) killing me with one spell, so I toughed it out for my dispel necklace. I really like that the game offered me near total freedom, but in the end it felt like I was just looking for ways to circumvent what I saw as design flaws rather then really enjoying the experience.
KOTOR was the first "standard" rpg that I literally chain played. As soon as I finished one character, if I had free time from work/school/relationship, I'd start another run through to see what I might have missed the last time. Unlike Morrowind, it didn't have any really annoying parts to it towards the end. The pacing was really solid all the way through, and the characters were (mostly) really well done. I always felt like I was playing the game, instead of fighting against the game.
Having said all that, my true favorite video game would have to be Deus Ex. I've played it so many times over the years that I have lost count, though at one point I discovered my savegame folder had ballooned up to around five gig, if that is any indication. The atmosphere, the music, the gameplay, everything about that game was perfect. I think it is the gold standard that video games should be held up against and I hope the new one lives up to its progenitor, but I'm not going to hold my breath.
Symphony of the Night deserves an honorable mention, it is another game that I've come back to several times over the years and I always have a blast with it.
Vagrancy - Be careful who you wake up in a twenty four hour parking lot.
His name was Not Johnny - A young man becomes a sort of superhero after a crippling injury. He