You are either DIFOP (Duty involving flying operations - i.e. a flying billet) or DIFDEN (Duty involving flying denied - i.e. FAC tour, MEU staff, etc) If I remember correctly, it is only the DIFOP time that counts towards htting your gates for increases in flight pay (somebody help me out here...).
If you go East Coast or West Coast, you will get PLENTY of sea time - 53D's in Hawaii seldom deploy aboard ship, and the 2 Phrog squadrons on Oki (they are the basis for the 31st MEU) deploy less then their other counterparts. I'll let the West Coast bubbas tell you about their pumps, but over on the East Coast we hit such ports as Palma Majorca and Rota (Spain), Toulon (France), Naples, Genoa, Trieste, Sigonella (Italy), Crete, Rhodes, Corfu (Greece), Izmir (Turkey), Haifa (Israel), Constanza (Romania), Varna (Bulgaria), and Odessa (Ukraine) - plenty of chances for good times!