I changed my name

[miotas]

Well Australian and American culture in terms of the lines (grandfather, father, son etc) are a bit different...

I was going to say Michael/Mike but changed to Rob...

I don't know anyone that goes by their middle name here.

I did know someone like that once, each firstborn in his family was called Robert so he went by his middle name, Alex since he hated Robert. We found out one day when a substitute teacher called the roll and after that we would often make fun of him and call him by his first name.

On your name, pever. I think it's Nick, since Nicholas is the first "N" name that comes to mind that is still a proper name when short.