If you see an independent, most of them say, tipping is not required, but is always appreciated.

That doesn't mean that they expect a tip, I'm sure that your repeat visits are a good enough tip in itself!

Ladies that work for agencies, have to pay the service a fee and
normally always work off tips.

Hope this helps.........
Kelly~

I have almost always found as you say, a gift seems better appreciated than a tip.  Especially if the gift indicates that you have listened to her and/or done some research on what she likes.  The fact that you took the time and interest to personalize it counts a lot.  Some recent examples are the recent National Geographic photography book for a Lady studying photography and a silver hair beret for a Lady whose hair kept getting in her way.

but, I would suggest something a couple times a year...

Shaye

I don't get tipped every time either, but it's always a nice gesture. A gift from the "wish list" is always appreciated. I'd rather have repeat clients who appreciate my service but, hey, a little extra every now and then is awesome and surprising!

Hugs,
Ciara