There is great diving on both sides of the island. Anyone trying to tell you otherwise is basically full of B.S.
Advanced divers are not more suited on one side or the other. Again, this is just BS.
On your trip, visit both sides and explore what Roatan has to offer in terms of diving. I would suggest visiting Utila as well via Vern on his catamaran. Basically, my two cents involve diving in as many of the spectacular places the Bay Islands have to offer.
Huum.. With all due respect marco, who in this post said the diving was better on one side than the other? Nobody! It was said, and I quote "Is the diving better off of one side or the other? Not really, it's just different."
And as for what Roatanman said about diving abilities... I've never been on the North side... But I can confirm what he said about the south side! It is full of tiny little critters that you really need to hover in close to see properly, without thrashing the reef. And this is an advanced buoyancy skill! It's not essential...
but you'll definetly miss a lot if you aren,t good at buoyancy...
And as for your suggestion of visiting and diving all over, well that really depends on how much time they are there! if they have 2 weeks, yeah, sure moving around visiting and even going to utila is great! But if they only have 1 week, and want to get in a decent amount of diving, I think they should just stay put in one place and do any visiting from there. After all Roatan isn't that big and you can get anywhere from anywhere...
I don't really know why you got your panties in such a tight bundle about this post. I didn't read anything really wrong or misleading in it! Anyways...
To the original poster. i think it would help if you could let people know a bit more what you are looking for. Are you looking for all inclusive? Or small dive shop and hotel? Night life/ bar? Just quiet? Only doing a few dives? Or do you want to maximise dive time? More help in understanding what you want would be good!
Cheers and peace everybody!