People who have them will like them on others.
People who don't won't.
The Don'ts outnumber the Do's by a big margin however, so, IMO it probably is not a good business decision for an SP to get them.
Certainly, when it comes to models doing art/soft porn shoots, having tats is a strong negative. Those that have them will often apply body makeup to cover up so they can get work. The girl shown in the picture above for example probably gets far fewer assignments and gets paid a lower rate than she would otherwise be able to get if she had no tats.