Several years ago I registered as a Democrat. I did this after much careful consideration. Below are the 5 primary reasons.
I want the Democrats to think there are more people on their side than there are, to become overconfident.
I want voting results to show that Democrats voted across party lines.
I want the DNC to waste money advertising to me.
I want to vote in their Primary, helping pick their candidate.
I don’t want the PostOffice to misplace and/or destroy my ballot.
Here in California, I would probably have more influence if I was registered as a Democrat and could pick more moderate candidates in the primaries.