What is your Favorite Disgaea game?

Mine is shrouded in nostalgia. It's Disgaea II for the PSP. I got this emulation device and it came with it and I started playing randomly. Then I LOVED IT! I would stay up all night playing it waiting until the last moment to sleep. When the emulator corrupted the iso save data and other things in my psp library I learned a LOT about how to recover a save data to play on my save again.

So, what's your favorite Disgaea game? Is it shrouded in nostalgia?