I'll admit, I don't know as many RPGs as I probably should...
Also, I personally don't know what games count as RPGs - for example, I'd still say Fire Emblem & Disgaea are more strategy than RPG, and Kingdom Hearts is more Adventure, but I'll include them here anyways.
5/5 - Pure awesome.
Final Fantasy VI
Final Fantasy IX
*Persona 4
Shin Megami Tensei: Lucifer's Call (Nocturne) - One of my favourite two games ever. Can't decide between this and Smash Bros. Melee.
4/5 - Epic.
*Baten Kaitos: Eternal Wings and the Lost Ocean
Breath of Fire IV
Final Fantasy IV
Fire Emblem: Path of Radiance
Kingdom Hearts II
Pokemon Gold/Silver/Crystal
Shadow Hearts: Covenant
Shin Megami Tensei: Digital Devil Saga 2
*Super Mario RPG
3/5 - Good.
*Disgaea - Mighta been better if I actually owned it and could finish it.
*Etrian Odyssey - Starts off slow, gets better.
Final Fantasy I
Final Fantasy VII
Final Fantasy VIII
Fire Emblem: Radiant Dawn
*Golden Sun
Pokemon Red/Blue/Yellow
Pokemon Ruby/Sapphire/Emerald
Pokemon Diamond/Pearl
Suikoden IV - Yes, you read that right. I always get Viki early, so the sailing's never a big problem. =P
Valkyrie Profile 2: Silmeria
2/5 - Bad.
*Breath of Fire: Dragon Quarter
*Dragon Quest VIII: Journey of the Cursed King - Too slow, too repetitive. Might've improved, but I got bored.
Final Fantasy II
Final Fantasy X
Final Fantasy X-2 - Not necessarily bad, as long as you abuse the Skip Scene feature.
*Kingdom Hearts
*Paper Mario: The Thousand Year Door
Pokemon Battle Revolution - As below.
Pokemon Colosseum - Not bad by all rights, but too limited.
Pokemon Stadium - As above.
1/5 - Awful.
*Final Fantasy III (DS)
0/5 - Pure crap.
*Final Fantasy XII
I've probably forgotten quite a few here... Ah, well. ^^;