I mostly use older figures (I write stories with Poser), because there are more of them, and older figures have more options available for them. I prefer normal sized people as opposed to the freak show proportions that are popular now, so I primarily use the SM figures (P6 and above - love the G2 figures and all the Mikis), and a number of other 3rd party figures, such as Koz & Kez, Antonia, Mariko, Michelle, Femasu, Apollo Max, Rikishi and others. I'd bring in Eroko, but she is tied up right now (Bonus points if anyone gets the joke.)

As others point have pointed out, limiting oneself to 1 or 2 base meshes means that everybody looks like they are closely related to each other.

AFA La Femme - One of the symptoms of madness is doing the same thing over and over, hoping for a different result. LaFemme is great if you are doing NLFIATWAS or pin up renders. But just like every other post-V4 figure, she is limited to early 20's Caucasians and hookerware (unless you are prepared to spend a LOT of time in the fitting room converting V4 content. If LaFemme ever moves out of the Logan's Run mindset, I would use her, but at the moment, she is simply too limited - I got tired of doing pin-up about 14 years ago.