I think a watermark looks good, done tastefully. Not a bright red blob of text over the subject's face. That said, I've never watermarked any of my pictures. None of 'em would be good enough to steal. xD
Generally speaking, I like watermarks because they let me find more pictures done by that person.
facebook page // nh/mass cosplay events
Next event: ???
COSPLAYS IN PROGRESS
Gig (Soul Nomad) - Constructing
Vaati (LoZ Minish Cap) - Planning
Soren (Fire Emblem: Radiant Dawn) - Constructing