If it wasn't me who replied on that other board that Bunaken was over rated, i'll say it here : "I have the sense that Bunaken is over rated".
(Philippe, Hallboy #2) already knows my opinion about the place... coral devoid places, lack of biggies, mediocre viz, Bunaken was for me a HUGE disappointment. Bangka straits is really worth, as well as Lembeh, otherwise I felt like losing time in Bunaken park.
As for my credentials, I went in N/Sulawesi 4 years ago, dived for approx 8 days on premises, 3 on Bunaken marine park and... left the place for Manado, Lembeh or Bangka dives. I was not the only one i my party to have the same opinion.
I'm not an old timer on this place, grouching about the glory of past diving, nor a novice : for me there are lots of places that IN MY PERSONAL OPINION rate above Bunaken, below or topside, such as the Visayas, sipadan/mabul, other spots in Indonesia and some selected spot in Thailand's Andaman side.