Well, let me just say that everyone has the same hivemind about Persona 4... That you should definitely play it... Rather on your PS2 or, if you have one, on your Vita... Also, if you have a PS3, you can download both Persona 3 Fes and Persoan 3 Portable off PSN...
Frankly, asking if you should play Persona 4 is like asking if you should continue breathing... A little far-fetch in my analogy, sure, but dammit! Those Persona games are the shit and anyone should have a chance to play it, glob dammit!!!
In other words... Play it on one of these recommended devices... The PS2, PS3, PSP, or PS Vita... (unless you're like me and want to play it on ALL the recommended devices...)