Intrestingly, we were talking about this at the squadron today and from my(i.e snuffy) level it has more to do with command opportunities as a lt colonel and colonel than anything else.
A hornet pilot has 6 dedicated single seat squadrons at the LtCol level plus the 6 two seat squadrons they split with the WSO's. Then MAG-11,MAG -12 and MAG-31 are exclusively(or so it seems hornet commands) Add the possibility of MAWTS-1 and things look up for those 7523's
The Phrog guys are even better off(%wise at least) They have their phrog Squadrons at LtCol but at Col they then get to be MEU CO's and those commands seem to show up in a large number of Generals' Bios. Most of the MEU CO's have previously commanded either the BLT(grunts) or the principle aviation asset namely the Phrog squadron. Add the various helo MAG's and ...you get the pic.
Harrier guys seem to be have a lock on MAGS 13 & 14 and/or MAWTS-1.
Prowler pilots (in case your curious as I was) have the 4 VMAQ squadrons where the ECMO's outnumber them 3 to 1, then after that since MAG-14 has had(past 2 CO's if not more) a harrier CO, well I don't quite know what happens to Prowler pilots that are full Colonels. Truth be told don't think I've heard of or met one yet.
That's a snuffy's perspective, I'd be curious to hear what the more experienced guys think.