Currently at around 300 domains: 95% .com, a couple of .Net, Info and Org.
I'll develop a few, learn more about domaining to better understand sell opportunities, and sit on the rest for a while. Have owned most since early 2000's.
Dropping sh*t names daily, but buying and handregistering even more names.
I cannot prove that quantity means quality, my biggest unsolved domaining problem BTW.