Tattoogirl -
Can they reject you based on your appearance? Yes, they can. There was a time when they were against men having beards. My father when he was in the org. was confronted by the elders several times over the fact that he had a beard. Seems insane doesnt it? To say that you are not acceptable because of the way you look and therefore cannot have a relationship with God or Christ purely because of your appearance seems to me to be prejudism of the worst sort. In so doing they are trying to decide for God on who can have a relationship with Him based purely on their shallowness of looking at purely the outside person. They make the assumption that the outside looks reflect the inside heart condition and so therefore if you do not meet their expectations on looks you are judged not worthy.
Ask yourself this - did Jesus reject people because they looked different, did he reject men because they had beards? In the WT publications he is himself shown to have a beard.... my father pointed this out to the elders but they only thought of him as showing a lack of faith in the society and its rulings and so therefore he was dubbed a troublemaker. All for having a beard that he did not want to shave off! You will find examples of this sort of thing over and over again.
When I was young and in the org. I can remember talks on the improperness of wearing denim jeans - they were seen as sexual objects and anyone wearing jeans was seen as spiritually weak. At the time even though I was impressionable by the 'truth' I saw this as extreme since I had several pairs of jeans at home and just viewed them as clothes. Can you imagine what would have happened if you wore jeans and had a beard at the same time - you'd virtually be an apostate! So I'm afraid they will judge you on looks and will judge you harshly - your'e only chance to progress within this religion is to conform completely to the regulations passed down by the 70/80 year old members of the Governing Body... They will tell you that your life depends on wearing the right clothes, having the right colour hair and having no piercings, if you want to see what they expect just look at the people shown in the pictures in the Watchtower. They want that to be you and will expect you to change the way you look to suit them. They wont expect this change all at once but over a period of months the elders will be keeping an eye on you to make sure that this takes place. Whether you go through with this or not is up to you and although I find certain aspects of the religion interesting after 25 years I no longer associate with them, and I still wear jeans... still no beard though!