Hmm, well...
I want to see a gameplay system something like DA:O for a real-time action based JRPG. To be exact, I want the ability to go into a menu and program each character to act a specific way, such as setting them to "assault" mode for a more aggressive attack pattern, or "Healing" for casting healing spells or whatnot when needed, or a "magic support" or "magic offense" for supporting spells and offensive spells. Even more though, I want to be able to program a response for a given situation, like if I get below 20% health, my healer will cast a healing spell on me fallowed by a stat boosting spell.
For WRPGs, I want the mechanic where good, strong weapons are rarer, while most of the weapons you buy in stores are mass-produced, thus cheaper but are less effective and less durable. Really, im not sure how to explain this well...