Completed two dives in Koh Tao today. Great viz on Chumphon and nice swim throughs on Red Rock; but honestly, much less sea life than the outer islands in Pattaya (like Koh Rin, for example) by a huge factor. It makes sense. All the plankton that makes the viz low attracts a lot of fish up and down the food chain.
Also, found it interesting that two DMs on the boat have never dived in currents, never done a ripping drift dive, and never have seen strong current rip a mask off a diver going down a descent line. (I heard that there is very little current here, generally speaking, compared to Pattaya).
I'm learning a lot, and am really glad to be here!
But so far, I don't think the "Pattaya has bad diving" that people often say is correct. Yes, the viz here (in Koh Tao) is great so far; but my last dive on North Rock in Pattaya had orders and orders of magnitude more sea life (fish, fish!, fish!!)
Of course, it is way too soon do draw any conclusions. After I log 20 or 40 dives here, I will be more confident (and in a position) to type an (comparative) opinion.
Absolutely, without a doubt, the "dive center atmosphere" here is really great and the people here are really "dive focused" in a good way.
So far, Koh Tao is a great place. I really like the vibe, the people and many things about the island. Have met some very good people, absolutely.