I use cam preview setting as my log in default. The avatars are fine, some are lovely pics showing the model at her best/ or how she defines herself, a simple right click and you can preview anyway.
My log in usually involves a simple scan of my friends online first, the preview feature avoids a few clicks to get an overview of each of my favourites mood/ look.
When exploring MFC, preview setting can offer a few extras, for example some idea of how active a model is on cam. Can be a good indicator of someone having fun on cam. Often our eye can catch a model on each exploration (even as we overlook her), if the preview varies there is a greater chance of capturing a visit, active models are so much better generally.
I find preview feature and a peek at profile far better than using the lounges for previews. I never trust anyone elses comments on others, I often find them so inaccurate especially when it comes to members opinions on models (but some types of profile comments can be worth paying attention to).
Preview setting can be a bit data hungry when actually in a room though, sometimes to get a better feed I have typed a few letters in search to limit it to a few previews.