I played the first one (mostly at the beginning), but it crashed, so I didn't finish it.
I played the second one several times and finished it.
I also played Tactics.
I don't really feel like playing the first and second games again (but I should finish the first one), maybe I'll play Tactics again, but I'm not sure... but I would play the third one, especially since I still have saves from my previous playthrough, but I don't have the game itself, and my gaming computer isn't always available.