My first bitcoin came from an exchange here in Thailand. I chose a local one and (later) discovered it was run by a very shady russian character. I was probably lucky he only screwed me once (by cancelling my buy order when the bitcoin price rose quickly). Lol.
After that, it's been mostly localbitcoins.com.

My first BTC was a payment from my client for writing an EBOOK on bitcoin. The main payment was in USD but he sent me 10$ worth of BTC.

Mine came from mining, an S1 I bought off ebay.

my first bitcoin come from btcflow, hahha

my first bitcoin came from a paid to signup website

My first bitcoin came from a client who hired me to make a website for him. He asked me if I take bitcoin as a payment. He offered me 3 bitcoin and I was like 'is this a joke? 3 bitcoin sounds like a penny' then I did my research and I was wrong. It was a whooping $1000+ back then and I was like hell yeah! So that's my story.

Haha I bought  them on virwox when bitfoin was peaking in the end of 2013.

Then after I did some research, I have realized that I got scammed for about 15% since virwox was taking outrageous fees.

Then I decided to open localbitcoins account and my second bitcoins came from there.

Someone at a party talked about Bitcoin, and I struck up a conversation with him. We went to his house and he created a test wallet for me, and he demonstrated with his Bitcoins, how easy and fast

transactions was done. He used about $10 worth of Bitcoin and told me to keep it... I kept it there for a long time, and used it on 3 other people to demonstrate the same thing I was taught.. The coins have since

been used, by one of those 3 people, but to be honest... I do not mind.. it had served it's purpose. I have bought and traded and worked and mined for the rest of my hoard since then.... 

My friend gave me my first 0.001 BTC.   

Bought from an exchange, it took almost 2 weeks back then... 2 years ago!