On the west coast it was very different. All the Hornets there are from Miramar, so only MOs got rides. There were 1 or 2 kids per week, not 10 or 20.
I went West 06 as well. Every Navy option got at least 2 flights, T-34 and either SH60B (generally some go Romeos I think?), S-3 (only 2-3 per week that were preselected for no apparent reason) or an F18 flight. There were 2-3 per company (so 4-6 per week) that got F18 flights chosen by the company LT. Our LT chose based on initial PRT scores.
HOWEVER, my roommate who scored the best for the females was slotted for the F18, but when asked (the first week mind you) what she wanted to do in the Navy she responded JAG. He gave her spot to another girl who asked our LT everyday if she could go on the F18. Ironically, after our aviation week my roommate wanted to fly and still does almost two years later.
Marine Options were completely seperate during aviation week. From what I understand, some of them got F18 flights, and all got flights in C130. I want to say they had 3 flights total, but I'm not sure what the third flight would have been.
East vs. West is hard to recommend though for anyone, because no one has been to both. Like everyone else said both have pros and cons. As far as I know West 07 only had one flight per person instead of the two my year received. So it also has to do with extrenal forces like money, time, weather, etc. It's really just luck. Like most things in the military really.