I've got one...He's a fun little fish. Just want something to perch on, to take a break, then he'll swim for a bit. Mine is always out in the open. Easy to care for and will hang with the big fish for food.
Midas blennies are cool little fish.Usually fairly active,not very picky about foods.
But be careful when working in the tank.They are fanged blenny and those fangs can leave a nasty wound if the blenny feels threatened.
I really enjoy ours. He come out and stares at me with those blue eyes every time I am near the tank. Certainly one of the more people social fish in our tank.