Hamanasi looks like a really well-run resort. I did most of my diving with them over the Christmas holiday, so I was on the grounds almost daily for 11 days. Their dive operation recently changed its name to Hopkins Divers, but it's still the same operation, and still run by Hamanasi.
Hamanasi's beach is one of the nicest in the area, with nice chairs everywhere and sun or shade. My non-diving companions would sometimes wait on the beach for my kids and I to finish our dives, and take advantage of the bar service.
While the near reef offers great diving, the outer reefs are the best. A brief (nearly a bounce) dive in the Blue Hole may not get you too excited, but the reefs next to it are stunning, and shouldn't be missed. Glover's reef was a close second;
Many of the photos in my dive report threads are from dives on those reefs. Those dives do take up a large portion of your day, but I was back from Glover's by 3:00, and back from BH by 4:00. We were fortunate to have calm conditions on both of those trips.
Hopkins Divers also offers the option of adding Lionfish spearing to your dive, and Hamanasi will prepare the fish for your lunch afterward. This insures that you will be with a smaller group, and a dedicated DM. I found all of their DM's friendly and professional; They certified my kids on this trip.
Pedro, was the Driftwood open when you were there? Pizza place on the beach, on the North End of Hopkins? Great food and music, mix of locals and tourists, and home to a fantastic Garifuna drumming exhibition.