I think the summer/winter dormancy question for succulents is interesting. I think it is relative to your latitude/longitude on the planet, not your season as we know it.
Do you have sunny dry winters, or cold wet ones? Hot dry summers? Or sticky wet ones? My winter dormants in FL could behave very differently from someone else's plants in Seattle. I think plants are triggered into dormancy based on several factors: water availability, sunlight amount, and temperature. Dormancy is survival mode. For example, I have a pachypodium I bought on the east cost of FL in November, further south from me. It has not entered dormancy yet. But all my other pachys have been sleeping since Thanksgiving. Just a difference in lat/longitude. Warmer, longer days.
I noticed on the sticky that Sansevierias are mentioned as winter dormant....mine explode in new shoots here during the winter like clockwork AFTER a rain, no matter the temperature or sunlight.
Maybe instead of a list of plants in each category, we should talk about how to take care of a succulent in dormancy.
