I like my family's chihuahua. He's definitely not the brightest dog. I didn't pick him out btw, I would prefer a bigger dog, but my mom won't have it. Mainly because she sees how messy my grandparent's house is with their medium-sized dogs, and how noisy they tend to be whenever they see/hear anyone near the house. He's generally nice, just not to small children. :P
Having said all that, I really don't care about other chihuahuas. I don't hate them or like them. I just don't care.