I love love love Nathan’s in Canoga Park. Small shop but totally good vibes. Wonderful artists, clean professional and fairly priced. Just got my first tat from them last week and I am in love! I am just itching to get more work from them!
http://www.nathanstattoos.com/
Also check out Kustom Kulture. I think they have two locations. There is one Artist, Tabitha, and her work is SICK! she is great in all styles. Tabitha works at the tampa shop.
http://www.facebook.com/TattooKustomKulture