Loch Ness has been busted quite a few times already. one of the more entertaining ones are Penn and Tellers Kryptozoology episode.
Ghosts? Well, I've never seen any proof of them. Prove it scientifically and you've convinced me.
Aliens I do believe in. I don't belive that they've visited earth, or atleast if they had we wouldn't know about it. Their technology WAY > ours if htey can get here.
If there is a god I hope he's something way more than our current ones. But probably not since our universe is so bloody boring..

And if God will ever be acknowledged as a fact or show himself to us then I'd still not worship him. He sucks at imagination. Gods I'd prefer:
"Anoia
The minor goddess of Things That Stick in Drawers, Anoia is praised by rattling a drawer and crying "How can it close on the damned thing but not open with it? Who bought this? Do we ever use it?" She also eats corkscrews and is responsible for Things Down The Backs of Sofas, and is considering moving into stuck zips. The Maccalariat family of Ankh-Morpork have been Anoians for five generations. She is not part of the number of gods praised at the Temple of Small Gods, but instead has a freelance priestess who also serves for various other minor deities. Thud! refers to a painting of Anoia Rising From The Cutlery (probably a parody of the iconic Venus Rising From the Sea).
She was previously a volcano goddess, possibly under the name Lela. Anoia (and Lela) are first mentioned in Going Postal. She appears in Wintersmith as a tired, skinny woman wearing a bedsheet and smoking a cigarette that sparks like a volcano (she began smoking when the Storm God kept raining on her lava). On a whim, Moist von Lipwig named her as one of the gods responsible for his "miraculous" recovery of a large sum of buried money: since belief is what empowers Discworld gods, she benefited tremendously from the resulting surge of believers. As of Making Money her religion has seen something of a revival, and now she is the goddess of hopeless causes.
"Anoia" sounds like a Greek word meaning "mindlessness", but contains an obvious allusion to the verb "to annoy"."
or
Sheogorath:
http://www.uesp.net/...ring:SheogorathHeh, I hope God is Terry Pratchett.