I use Whatsapp+ D
Which allows me to send photos/videos at high quality, and even go offline (this feature works if you buy the donation key)
I also use Hangouts. TBH I like it more than whatsapp, but not many of my friends use it. I like to be able to chat from my PC and have the conversations synced with my mobile. Another plus is that photos sent/received are synced with my Google+ account!
So yeah, I don't use chaton