I second Fable (it is short =/), morrowind!, fallout 1-2 and dynasty warriors though I've only played it on ps2 Post Merge: [time]1261160726[/time] Oh... You already have dynasty warriors XD
As exor suggests, try Warhammer 40,000 Dawn of War: Soulstorm or Dark Crusade. This my favourite rts, ya know...
you should totally get Dynasty Warriors for the pc ...It's so freagin awesome ^^...it was my first ps2 game
Well if you want low-spec games you can try Fallout 1 and Fallout 2 ( Wasteland Merc 2 is very good). If you like TBS you can try Ascension to the Throne - A very nice Russian game, if you like HOMAM3 you'll feel like home here. Another ancient game is Septerra Core: Legacy of the Creator. An old-school style rpg.
There is actually FF VII and FF VIII for PC. But most RPG games for PC isn't like JRPG games though, more western RPGs.
I am baffled that nobody has mentioned Arcanum, *Scratch the Fallout* Arcanum is made by the People who made Fallout 2 by the way, and can let you play it like Diablo or like Fallout... ;D Must Gets for Fallout: Killap's Restoration Patch - http://www.nma-fallout.com/forum/viewtopic.php?t=42776 For Arcanum: Official 1074 Patch Drog's Unofficial Patch (Fixes lots of bugs) - http://rpgcodex.net/phpBB/viewtopic.php?t=39612 High-Res Patch Level Cap Remover,The one which lets you get to 127 (Unless you want to be Level 50 Max)
So, you say Arcanum is good, eh...? I think I'll download it : Hmm... but tell me one thing - it isn't like Baldurs Gate, is it? I don't like this game :-X