I just moved away from West LA.
My three favorites dispensaries are:
1. Pure Ocean Grown Kush (delivery only)
They are great people and they grow a top-notch sativa. The bud is potent yet non-drowsy (or in other words, it seems too good to be true, but it's true)
2. LA Treehouse (Marina Del Rey)
Good people, good vibes, good bud. I love the Banana Kush, the Skywalker, and the Larry Bubba OG. They have some really unique sativas too like Pandora's Box and Alaskan Thunderfuck. They have four categories: Indica, Sativa, Hybrid, and Private Reserve. The Private Reserve is overpriced, but the flower is terrific. Once you try the Private Reserve, it's hard to go back to the other stuff (like switching from dial-up to high-speed)
3. The Green Dot (Venice)
A little crowded and "trendy" for my tastes. I prefer a more mellow dispensary experience, but I can't deny that they have a wide selection of good bud, very cool interior design, and one of the budtenders was so gorgeous I thought she was a hologram. Normally I feel confident with the ladies but she turned me into a drooling, catatonic zombie. I tried to say "hello" but I think I just opened my mouth and stared, paralyzed.