Hi all!
I am Gabriela and currently a Level 6 Guide. I am based in Sao Paulo, Brazil but I was born in Buenos Aires, Argentina and very lucky to travel a lot worldwide.
And I am sure I am older than most of you, guys! 
In my last position I was responsible for a Latin America scope and travelled quite a few times to Chile, Argentina and Mexico. Because there is a lot of Mexican folks around, I can`t say I know DF well enough to recommend something. But I can give some tips about Buenos Aires and a lot about the city I live in.
Before Google I used to travel a lot and told my closest circle about the great experiences I had everywhere - and often I searched for other relevant tips for myself! But that was very small… Google brought this to a worldwide dimension that is absolutely amazing! What I love the most about being a Local Guide is that I can have fun, meet new people and also help others share terrific experiences like the I ones I have! Collaboration - that is the key word for me.
I would love to meet up with other people that think like me and help create this wonderful virtual environment and make people lives’ better by sharing their thoughts and impressions about the places they visit. Let’s keep it up! Cheers all!