There are several wrecks that I would rate as 'outstanding' that stick in my mind
HMS Pheasant, off Hoy, I've made 3 attempts to dive it, only reached it once - stern section intact, 3 props, small and very elegant, a gun fallen to the seabed, very interesting debris field, which is rock, so theres nothing buried, what looked like torpedoe tubes, and then loads of boilers - ran out of time then - tides are really strong, and tidal window can be non-existant, but well worth the effort. The quality of the fittings had to be seen.
HMS Hampshire - again beautiful fittings and impressive casement guns and props
HMT Asia, near home, upright, intact to the boilers, then the engines are 'missing' the intact again towards the stern, nice telegraphs and pineapple light diffusers
Unknown 20 miles off Wick - complete surprise, expecting half a destroyer - landed on a small steamship upright intact to the forward hold, portholes in lines down the deck, neat engine, all the glass in the gauges daylight visibility - just beyond words
Markgraf - after all these years I still always have a great time guddling around underneath this wreck