i agree with you on all of these except snooki, who i still think is an ESFP.. i just don't see her as a J at all, and she's definitely a sensor with Se, not Si.
I am not certain about Snooki, but she seems heavily Fe oriented. For instance, her first line is that she wants to meet the man of her dreams, however disgusting that man may be. An Se would not care about that and just wants to live it up. But her recurring theme is to establish a relationship, and when she initially doesn't gel with the other guidos she considers leaving. This is all heavily Fe oriented.
Also, do bear in mind that
none of these people Guidos are not exactly the healthiest and most well developed personality types around. I do see Se in Snooki, which further leads me to believe she may also be an intuit, albeit a
very underdeveloped one. Fe, (weak) Ni, (overcompensating) SE, Ti. It would also explain why she would have wanted to leave, she's more in-tuned to vibes.
I don't know, Pauly D is always really even-tempered and stable. A lot of the time he stands back in the group vocally. Not extroverted ESFP-style at all. Seems like a thinker.
eSTP.
I haven't known ESTP's to stay back in a group. Hell, guido-central's resident narcissist is the cause for many conflicts. ESTX's are not avoidant of conflicts, IXTX's are. His not engaging in conflict doesn't seem to be level-headed as much as dislike, while a thinker would dive right in.
Also, he is both the oldest of the cast (28) and the most experienced in the scene (DJ). Unlike the other younglings, he knows his place and what he wants to do at the shore, and being a DJ, it is his main job, whereas for the rest it is a hobby. This combination of age and experience adds up to maturity. That's not to say he is the smartest, its just that conflict is not on his mind. For that matter, there's probably not much going on in his mind either...