So my name is taken as far as usernames and websites go so I want to replace the s in my last name with a z and just go by that. For example: Dave Herzberg instead of Dave Hersberg. (Not my real last name.)
Which then will give me… www.daveherzberg.com + usernames.
Will misspelling my name matter at all in terms of business?
I don’t see why not, so long as davehersberg.com doesn’t do business in your area (which would open you to complaints for common law service mark infringement and unfair competition).