I spent two weeks diving and snorkelling in Marsa Alam. Having dived in the Seychelles and all along the African east coast, I have to say that nothing I've ever seen tops Marsa Alam. You could spend two weeks diving from there and leave wanting more. Everything from reef dives, beach dives, shallow and deep water, turtles, sharks (oceanic white tips if you're lucky/unlucky depending on preference!), sea snakes, Lion fish, and everything in between. It's simply incredible, and the resorts over there are superb, with great diving facilities.