People are
very sociable on a liveaboard. In several cases I've stayed in contact with people I've met for future trips.
Some group will likely "adopt" you almost immediately. We had 3 single divers on the same boat, by the end of the trip everyone went to dinner together. It's really hard
not to meet/talk to people on a 120' boat. I don't even know where you'd go to get away except your cabin.
You eat all your meals together - there's just enough table space for 20 (boat capacity) at one seating. You'll all also either hang out on the sundeck or the flybridge between dives. (they frown on wet gear on the carpet/couches in the lounge) A group of about 6 of us always did our SI's on the flybridge since it's shaded. They also stock alcohol up there for after diving.
You'll also be paired up with a buddy. And unless you're paying the single supplement, likely sharing a cabin. My regular buddy and I often wound up often eating with different people - and sometimes diving with them. We also dove in groups of 2,3,4 and once 8. Everything is pretty informal on that boat.
It would be hard not to make friends on a liveaboard. Everybody usually talks diving thru dinner and shows off pictures/video afterwards. Many divers do go to sleep early since 4-5 dives/day is tiring.
Although on our T/C Explorer trip, we had a small group of about 6 that stayed up late nightly - I was one of them. I usually make friends with at least one member of the crew also. Last trip it was one of the DM's, previous trip the backup captain. So late one night I got to drive the boat since I'm an insomniac.
It's a nice boat, you picked a good one for your first trip. The crew is helpful and friendly and the diving is excellent, especially at French Cay and West Caicos. Every single dive at French Cay we dove with sharks - one dive I almost dropped in on top of one. Since generally only they and Aggressor go out there (except occasional dayboats from Provo) it's pretty pristine diving. Plan to be ignored by dozens of Stingrays - I was.
You might be interested in this also:
http://www.awoosh.com/Saudio/Saudio_Turks&Caicos.html - we saw everything Mike did except the dolphins.
WiFi works at the dock if needed.