I've gone to Dauin 3/3 trips to the PI and will consider returning when I next go to the PI. During all 3 visits, I stayed at El Dorado. Their dive guides, Rey and Lito, are top-notch, IMO. Rooms include AC and TV, and the restaurant has a wide selection. Compared to other resorts in the area, I've found them to be affordable, especially for a solo traveller.
My guess is you'll get more recommendations for Mike's, but I found them pricier than El D. so I've stayed away.
If you want some time off from diving, Dumaguete is nearby and worth exploring as are nearby towns whose names escape me. Last trip down, I made a point to go to Valencia, I think, to see the waterfall. Helluva lotta stairs, but worth the effort.
Good luck with whatever you decide.