Maybe you have the time to "compose" the shot to your own taste and better judgment, getting a good background and putting on your favoured expression & stance, etc.. In which case the picture really is better by the general guidelines that you would want to apply to other photographs that you take, what ever the subject might be.
Alternatively, some people (myself included) just have a natural confidence and high opinion of things that they have done themselves - even if they are not actually objectively better. For example I almost always feel happier with (for example):
(a) a meal;
(b) a work of art;
(c) some building work;
If I made them myself. Logically I may know a professional would probably have done a better job, but I nevertheless feel more satisfied with my own work, simply because it IS mine.
Best wishes - Majikthise.
this always happens to me aswell! its proberly cause when you take pictures of yourself you try and look nice but when someone else takes a photo of you, you dont really give a sh!t :) xx
BeCaues there jelisa of u