I could probably fill a top-five list of RPGs I loved.
1. World of Warcraft
Yes, I'm one of those Blizzard zombies who loves World of Warcraft. I didn't get into it by a friend like most people (quite the contrary, I found some buddies in reality who played the game a considerable amount of time AFTER I started playing), I saw an advertisement for it online and figured I'd try the 10-day account thing on a whim. I had played Warcraft III that I had borrowed from a friend/neighbor some time before (I have my own copy now), and I liked the story of Warcraft, and I figured "oh wow, I can become one of those heroes? That sounds cool! I'd like to try that!" when I saw what WoW was about. Needless to say, the trial blew me away and my brother got me my copy for Christmas (soon after the Burning Crusade came out and I bought that, making my first character a Blood Elf since I enjoyed Prince Kael'thas's story and fall from grace in WC3 and made him a paladin since the thought of healing, heaviest armor and biggest weapons sounded cool to me and I still play that character to this day, he's level 80), and the rest is history.
2. Elder Scrolls IV: Oblivion
This one was great. I had never played an Elder Scrolls game before, but the medieval look hooked me and the story sucked me in. Love the story, but love to go on rampages with the Gray Fox's hood and murder all of Cyrodil.
3. Fallout 3
Another Bethesda title, this time in post-apocalyptic Washington D.C. The first time I saw the D.C. Ruins, it really made me think, "wow, this could ACTUALLY happen if there was a nuclear war." It's so deep and immersive, and the main characters are great (Three Dog is that one voice that you will love to hear praising your actions in the game, good or evil) and the opening and closing sequences are beautiful, especially with the narrator being Hellboy, by day known as Ron Pearlman.
4. Any Pokemon Game
I was about 12 when I first got sucked into the pokemon games. I heard about it from television commercials, and thought "wow, that looks really fun!" Of course, I was 12 at the time as I said, so I was sort of the target audience, perhaps being a clear indicator of Nintendo's marketing strategy to this day. I got Pokemon Blue version, my brother got Red and I got sucked in and still haven't come back out. Even so, I prefer most of the Red/Blue/Yellow and Gold/Silver/Crystal creatures, even some of the Ruby/Sapphire/Emerald creatures to the ones in Diamond/Pearl/Platinum. Even now, though half of my team in Diamond consists of Rotom, Garchomp and Leafeon (the others are Feraligatr, Charizard (which I wouldn't mind swapping out for something else, maybe Typhlosion) and Hypno), I wouldn't mind changing out Rotom with something else, maybe Aggron or Metagross. Anyway it's simple gameplay but fun, though I wouldn't mind a full 3D pokemon game like the portable ones where you go around capturing pokemon instead of stealing them from people and let go to ALL the regions of the pokemon universe (Kanto, Johto, Sinnoh and Hoenn).
5. Final Fantasy X
Final Fantasy X was another entry in a hideously ironic game series. Suffice it to say, it was actually good, which was different from a lot of the Final Fantasy game elements I've encountered (most of them from Final Fantasy VIII, ironically). The environments were great, most of the characters had actual likeable traits (Auron especially seemed like the most badass of all the characters), a villain that returns from the dead TWICE to try and kill you, and a minigame that was actually some measure of fun, Blitzball. I actually liked it compared to the crappy card game from VIII or all of them from VII put together. My experiences with the Final Fantasy series has been limited severely to VII, VIII and X, and X is definately the best. I just wish they didn't crap it up with Final Fantasy X-2...
And so I did fill out a top-5.