in my case, I like to be given an option. Also I do like a lot that ZCash has very few coins comparing to Bitcoin and Monero.
Personally I belive that optional privacy decreases the overall privacy of the cryptocurrency. And I do not believe that you should evaluate a project by the quantity of coins.
Zerocoin privacy is optional, yet it does not decrease overall privacy. In zerocash, on the other hand, it is more like optional transparency longterm, which is beneficial.
