Definitely... The first time I play a JRPG I play for the story only... Then I will play for completion.
This is particularily apparent in games such as FFXII, FFX-2 (A game made of pretty much only side quests!) FFIX, Persona 3, and some of the others I have played on the DS (Mostly other FF's) I will sometimes set challenges, although none of them that hardcore... mostly things like FFIX with non magic characters only when possible, or FF1 with 2 monks! (Or the easy boring 4 Warriors option...)
WRPGs and SRPGs on the other hand tend to have a lot more replay factor... due to the fact that they tend to have a lot more customisation to your character. For instance, Baldurs Gate and Neverwinter Nights I have played repeatedly, and Dragon Age and Oblivirim I have played quite a few times with different builds too!
This is particularily apparent in games such as FFXII, FFX-2 (A game made of pretty much only side quests!) FFIX, Persona 3, and some of the others I have played on the DS (Mostly other FF's) I will sometimes set challenges, although none of them that hardcore... mostly things like FFIX with non magic characters only when possible, or FF1 with 2 monks! (Or the easy boring 4 Warriors option...)
WRPGs and SRPGs on the other hand tend to have a lot more replay factor... due to the fact that they tend to have a lot more customisation to your character. For instance, Baldurs Gate and Neverwinter Nights I have played repeatedly, and Dragon Age and Oblivirim I have played quite a few times with different builds too!