You gotta be kidding me, do you remember that abandoned ship from Hoenn, with all the holes and whatnot. And at night, the entire ocean around it is creepy, and you cant possible escape. lol
On the other hand, I think both are equally creepy. Pokemon tower reminds me of Haunter's evo line so it kinda softens the creepiness I guess lol. (then again, Dusknoir doesnt haha)
Depends, I know you tried to make both options unattractive but lets put it this way. In reality, you wouldnt just be able to touch Magcargo with bare hands, you'd probably massage it with a rock something and whatnot. And for a diver, I assume you'd go out every now and then to refill the scuba diving bottles, which is nice, cos I love diving.
I'll go with the massage NPC, and in my breaks I'd go diving! (Didn't expect that, did ya?) :P :D