Yes, that's why, as you know, most of the liveaboards there do 12 night trips. While more costly, they are most cost effective for the cost to get out there.
There are pros and cons to land and boat as we've discussed. No discussion is going to change that preference. I enjoy the liveaboard trips the most and get more than just a ride to the dive site out of them, but that is my interest. I've rarely felt seasick. For those amongst groups of islands they tend to anchor in a sheltered area by day with little apparent movement and maybe move once at mid day to a new site. They tend to make their crossings at night. The bigger the boat the better though it can't be top heavy.
My perception of seasickness was that it may affect you initially but then you get your sealegs. It's interesting if that isn't happening for Fearless. Fearless, in my slightly educated guess, I'd suggest two things for trying to fix it in the future: I do find that it can be psychological. If I start getting concerned about getting seasick, I can start bringing it on. That happens to me too with anxiety over making the trip to the boat. Without feeling I'm stressing, I start thinking about whether I'll have trouble on the trip out and that starts making me feel bad. I literally start feeling physically bad like nauseous. I don't feel like I'm worrying yet I have a hard time turning it off in my head and that just starts bringing on the exact symptoms I've trying to avoid. If I'm thinking positively, then it never happens. So I'm suggesting that it is possible that you are subconsciously bringing on the physical feelings through concern that it is going to happen to you, AGAIN. That's not a solution but a direction to consider. Second, I know that dehydration also has a pretty severe effect on me, including nausea and headache and lack of energy. I can change pretty quickly and it's easy to happen in travel and these hot locations. It could be exacerbating your sensitivity to the seasickness feelings. Lastly, I suggest you consider whether some physical change or problem is now causing this. Never having a problem and then having a problem could be a sign that something is wrong somewhere, like inner ear problems that aren't evident in your normal routine.
Or, you could just get seasick because you do...
Enjoy wherever you end up.
...must learn how to bold...