I agree with you completly, but I think it's funny how we think that, but still judge birds by their looks, lol.
Having said that, I have 2 pet birds. One was chosen for his personality and affectionate nature, but also happens to be a Sun Conure and so, very pretty.
The other is a Budgie who can't fly, who is thriving in spite of himself (I though he was a she, but he isn't) and who is yellow (not my fave colour, I was going to keep a blue one!). And yet, here he is, alive, well and loved. And named Hercules because he's the only chick of our 1st ever clutch who survived after a nasty cold snap. Tough little guy!