Yes. If you're the original copyright holder, you only give others cancer with the GPL. As the the copyright holder, you are licensing your code to others and as such, you subject yourself to whatever terms you want. But those who accept the terms of your copyleft license are bound to all the cancerous viral terms you set.

As a user, I prefer licenses like MIT that just give the code away with some reasonable strings attached. As a pip-squeak creator, I have to admit the copyleft licenses are attractive - the more viral and toxic (like AGPL), the better! I like being able to show off my clean and valuable code and have some reasonable expectation that no big corporation will rip me off. But then, universities and hobbyists will have full run of my code and that suits me fine.

Am I greedy? Am I stingy to think of my code this way? Should I be happy that anyone would see fit to use my code and thus maximize that chance by licensing with MIT? Or is no value ever generated with all the codes being completely free and open? I wrestle with this.