At the risk of over-sharing, I'll give you my experience, yours of course would certainly vary. I'm a very fair, natural blonde, and I have always been missing the "tail" of my eyebrows (what little was there didn't show up). As I've become more *mature*, from any distance, my brows seemed to have become invisible, which gives one a sort of surprised, if not spooky look. Since I don't usually wear makeup around the house and I like to look as good as I can without makeup, I decided to have my eyebrows done. Twice. The first was done at my derm's office spa, however, even after two visits, there was no discernible difference! I was nervous about it and she kept promising me I "wouldn't look like a tattooed lady", and I didn't! $300.
Everyone I knew who had theirs done and loved them (and they did look great -- natural) went to the same artist, so I went to her too. She used her lightest blonde shade (a taupe, really), and I've always felt it was too dark for my fair skin without makeup. Two sessions, $300. With makeup, it was fine. It makes tweezing very easy, BTW. After about five years, it's now faded to the point that it looks pretty good without makeup, but there are areas that need touch-up. I'm not going to do that at this point. I have observed most older people, male and female, have lighter, sparser brows and that looks more natural to me now. I put a little Anastasia blonde eyebrow powder over it when I'm going for "full makeup".
I do not agree that it was painful -- no worse than tweezing IMO, which is one of my "hobbies". LOL.
Now, I also had permanent upper and lower eyeliner (outer half of eye) done about 12 years ago because my eyeliner transferred to my hooded upper eyelids. That was a GREAT solution! To be honest, that was PAINFUL! Would do that again, (except for discovering I was allergic to the topical anesthetic and my eyelids stayed swollen "out to there" for more than a week!) The eyeliner has also faded, but it's still "there" and I just add whatever shade of eyeliner if I want more of an accent.
To recap my experience: Permanent Eyeliner -- Recommended! Permanent Eyebrows -- not so much, if you're a fair complexion blonde.
Lola