Mesh Mermaid Tail

I love that the mesh tail moves naturally no matter what pose you use it with. The Mermaid Tail pack by Fatebecome comes with an AO, but these poses are a Faery pack by Long Awkward Pose. You're not stuck with poses that work just for the avatar pieces. I might use this in roleplay, even.

Mesh Hair - Raising the bar

I've demo'd a few mesh hairs before this and thought they had potential, but this...this is worth knowing that the majority of SL will see me with a football on my head. Up with that bar. Note about this amazing hair. It has a color change menu with lots of options and the creator has included a notecard with some really good LOD tips.

Mesh Avatar / Golgothica

Nathen tried out a new mesh avatar the other day. If you haven't seen one in action, it's pretty amazing. It moves compeltely with you and poses/sits/etc don't bother it at all. The details on this one are amazing. Check out the creator's blog here, too.

Golgothica is a gorgeous sim. It's BDSM capture, but they allow visitor tags if you want to look around.