LogFAQs > #892816461

Disgaea 1 has the best story and humor, IMO. It is a great game and should be played first. The reason being, Disgaea 5 has much better mechanics and system but not as great of a story. The real joy in Disgaea games however, is after you 'beat' the game.

My opinion: Buy 1, play it and beat it (doesn't take long). If you are into it - by all means play the post game stuff. Personally, I'd jump right over to 5 and start there. You can easily get 100+ hours on any Disgaea game, but once you play 5, the others seem a little clunky. The stories in 2-4 aren't really that great.

Once you get into Disgaea, most other tactics games are way too slow and boring (looking at you Final Fantasy Tactics)