Why I deactivated my whatsapp account

I quit WhatsApp for a number of reasons:

Annoying Groups: The groups I was on in WhatsApp drove me nuts. This is my experience, it needn't be true to everyone. One 'Good morning' message used to get 19 other replies. It was unnecessary and didn't make sense to me. I know I could switch off notifications, which I often did, but, one of the groups I was on is a group including my friends from class (Engineering). They often discussed class schedules and results. This made me keep the notifications on until some of the members of the group started discussing something I wasn't interested in.

Last Seen: The Last Seen feature on WhatsApp was not always so helpful. It always was a negative thing for me. Let us be honest, not all messages from people share the same priority. May be you're having a conversation with a person, and when another person texts you on WhatsApp right then, it gets awkward. You can, may be, manage two or three conversations together, but after that, your replies get diluted on each conversation. Not answering to a person when you're online or when you've been last seen after them sending their text, leads to them mistaking you for not replying to their message. But, you might be conversing with someone very important and wouldn't have replied, in order to avoid a diluted conversation with both. It only stresses up things. With my old phone, sending text to one person was a task in itself, imagine 3-4 conversations.

Change in me: Between the time I got into WhatsApp and quit it, I changed into a different person. This change was not triggered by WhatsApp, it's a different issue altogether. Anyway, the new me prefered being alone and having little or no baseless conversations with people. I spoke to someone only when it was required. WhatsApp seemed like a network that wouldn't let me be that person

WhatsApp is a great way to communicate with people. It's just not for me.
I prefer SMS's