I suspect a lot of people don't realize how much is commonly seen off the 'Cobalt Coast' of eastern Florida in that area (I'll add nearby Jupiter to your Boynton and West Palm, since Jupiter is where I had 2 trips) that's not commonly seen in much of the Caribbean (some seasonal, granted). Putting aside the rare 'one off' sightings of the extremely lucky or those who dive there a lot, there are a number of things one on a single week long trip is fairly likely to see (varying somewhat by season). Goliath grouper are impressive, and there's the fall aggregation. Then lemon sharks in winter.
For the benefit of newer dives who may be intrigued, let me ask a few follow up questions. Jupiter is drift diving, the viz. wasn't as good as some Caribbean destinations, it tended toward nearly square profile diving over fairly deep bottom (dive plan might figure 90 feet to the sand, aiming for 45-minute max. dive time on nitrox or 30 on air; Jupiter Dive Center's site now says all dives require nitrox), and a guide was put in with us. I recall at Jupiter Dive Center the wonderful discovery I could rent 120-cf steel tanks! An air hog's scuba dream!
IIRC from what I've read here in the past, Boynton operators aren't as commonly apt to put a dive guide in the water, is that right? And West Palm and Boyton diving tend to be a bit shallower? Is nitrox as needful as in Jupiter? Do you think the viz. at West Palm and Boynton tends to be better, and is the drift experience similar?
Oh, oh, oh...and the famous shallow but bountiful shore diving at Blue Heron Bridge isn't far away! Take a day and mark that off the bucket list, too.