My nick comes from the fact i live in beautiful Cornwall UK, land of legend, mystery and smuggling (as immortalised in Daphne du Maurier's book "Jamaica Inn" which is just a few miles from my home) and where the Piskies live (little folk you don't often see), Piskies are known for their cheerful nature and playful mischievousness, they also bring good luck, i'm not exactly little but i am mostly cheerful and love to have a bit of fun!
So thats why i'm cornishpisky!
PS:
Merlin, the real Merlin is believed to have been Welsh and has connections with Cornwall through Uther Pendragon and later his son Arthur who became King Arthur and is believed to have lived here in Cornwall after being brought ashore at Tintagel as an infant by Merlin.
Ok, history lesson over, please forgve my rambling on LOL