I honestly don't care if someone takes selfies. If it doesn't harm anyone, then it shouldn't matter.
Special exception: selfies of/with people without their consent. We all deserve privacy, but culture also factors in here. It's simply a matter of respect.
I've taken selfies. Why? Something (or someone ♡) made me happy, I feel good, or it was requested. That's basically why I have instagram, to document thIngs that make my heart super happy (@kleirza).
I know when you look back and see someone with a ton of selfies, you may perceive them to be anything from conceited to lonely (because no one is ever with them/only selfies).
Perception is powerful, but someone else's perception of you should never bother you --even if it's true! Change it or embrace it. No one needs to feel bad for taking a selfie.