The people of Quito are extremely friendly and accommodating.  There are PLENTY of adventure trips leaving for the mountains every hour of the day.  Horse back, biking, kayaking, you-name-it!  Internet bars are plentiful as are hostels for backpackers. 

Ecuadorians use the USD, so conversion is unnecessary.  However, Ecuadorians will NOT do business with you if they don't like you.

There's a wonderful art fair in the park every Saturday.  Totally worth a stroll.

Unfortunately, the cuisine is less than appetizing for my taste.
It's very beany, ricey, potatoey.  The national dish is cui (whole deep fried guinea pig).  I'd recommend the Magic Bean for the biggest pancakes you've EVER seen.