This app tells you your personality by looking at your Tumblr account. You should really check it out. This is my result:

ESFP PERSONALITY

If anyone is to be found spontaneously breaking into song and dance, it is the ESFP personality type. ESFPs get caught up in the excitement of the moment, and want everyone else to feel that way, too. No other personality type is as generous with their time and energy as ESFPs when it comes to encouraging others, and no other personality type does it with such irresistible style.