There are quite a bunch of nice airports in the state, here are a few you might want to check out:
Aeroflex-Andover (12N) - Andover is a neat little airport. The runway is about 2000ft long, with lakes on both ends. Although 2000ft is enough for most light singles, I've heard that there have been a few cases of planes going into the drink. I've personally witnessed a Mooney landing a bit too far down the runway and burning a lot of rubber trying to get it stopped
Caldwell (Essex Co.) (CDW) - Caldwell is a nice Class D airport, not too far from Morristown. There is a very nice restaurant on the field, the 94th Squadron. There is also a night club adjacent to the restaurant, so if you fly in at night you can check it out. Very nice place, although a bit on the expensive side. If you go across the street though, there is an excellent chinese place, very reasonably priced too.
Sky Manor (N40) - Here's another favorite of many pilots in central jersey. There is a very nice and popular restaurant on the field, and a lot of pilots usually fly in on Friday evenings or weekends to have something to eat and spend time with buddies. They have large windows overlooking the runway and some benches near the taxiway for people to sit on. You'll probably have some spectators, so try not to embarass yourself with a bad landing
Sometimes you'll find interesting planes at Sky Manor too. I recall seeing an Antonov An-2 biplane several times, and they supposedly have an award-wining Glasair III based there. The runway's about 2500ft long, but there are power lines off one end, so it makes the approach a bit interesting!
Sussex (FWN) - Sussex is up in north jersey, near the PA-NY border. USAFHummer, if you're landing on runway 21, you'll be turning base around this hill that's near the airport, and you'll actually go below the level of the top of the hill on final, it's pretty neat. I haven't been up there in a long time, but I think 21 had a pretty long displaced threshold, it seems almost 1/3 down the runway!
Linden (LDJ) - EWR Spotter, since you mentioned you're only 10 min from Newark, Linden might be a place to look into for flight lessons. Although that's where I learned to fly, I'm skeptical to recommend it since a lot has changed there. I think it's worth visiting though. The airport has an interesting history. It was built around WW2 when General Motors was building FM-2 Wildcat fighters across Rt 1&9. They used to tow them across the road and test them at Linden, before delivery. Linden used to have 3 runways, but over the years one of them was closed. Up to a couple of years ago, the old WW2 vintage hangars and control tower were still there. The airport had been under threat of being closed down for quite some time, but they reached an agreement and decided to develop half the land, and allow the airport to remain on the other half. As a result, the shortest of the two remaining runways was closed, and the old WW2-vintage buildings demolished to pave way for *another* commercial center (as if the one block down the road wasn't enough!). Although a new building and hangars have been built on the other side, the place has changed quite a bit, with a home depot and target not too far from the runway. You should fly in there at least once though. It's very close to EWR, so you'll be able to see the traffic going into Newark go by not too far from you. And, if they're taking off to the southwest, they'll probably be climbing out right on top of you while you're in the pattern
Just to the north of the field the Class B drops to the ground, and over the airport the ceiling is only 800ft, so you need to watch yourself to make sure you don't bust controlled airspace. On another note, if you do land there, there is (or was, last time I checked) a Douglas A-1 Skyraider and an AT-6 Texan based there. The Skyraider is worth seeing - It's HUGE.
Greenwood Lake (4N1) - Greenwood lake is an airport you may want to check out if you like the Lockheed Constellation, as they have one parked there. I think it was used as a restaurant, and then by a boy scout troop as a classroom.
There's more nice places you can visit, but I think I wrote too much already. There are three places I'd recommend in eastern PA though. One was mentioned above, Van Sant (9N1) (Also referred to as Van Slant, for reasons you'll understand if you fly in
). The second is Flying Dollar (8N4), which is a grass field on top of a hill. It's slanted upward and has trees on both sides and off to one end, so you only land uphill, on the clear end. Since the hill drops off after the end of the runway, it'll give you the sensation of landing and taking off from an aircraft carrier (almost!). Watch it if it's windy though, there are some strong downdrafts near the end and you really need to come in with the power to keep from sinking. Definetly a place worth visiting though.
The last one is Lehigh Valley Int'l (Allentown, ABE). It's got a class C airspace and has airline operations, but it's not congested so you'll have no trouble flying in. The landing fee was only $5 I think, so it's cheap, and you'll get to taxi next to the big guys (well, bigger than you anyway!).
Well hopefully I haven't bored everyone to tears now. Good luck with the flying EWR Lover!