People just react to it differently online. In real life, hardly anyone ever argues with me. They just agree with almost whatever I say... I sometimes come across as mean on the internet because of the way people react to me, but never in real life.
It's not too different, other than I'm a bit plus vocal. I don't have many people that I talk to in real life, so opportunities to voice my opinion are a bit on the low side, not to mention none of my Friends would listen.
I'm plus outgoing and talkative online. I'm not shy in real life, just a loner. I also find it WAY easier to express my emotions and talk about my problems online than I am real life. Like 100% easier.