Actually... I have to disagree with everyone who said its our appearance really does not make a difference. Most of this is personal beliefs, some of which I have struggled with for a long time. So please no flaming me.
Appearance is important. How one looks, acts is perceived by the world affects one's witness. I have one question for those who dress Emo, grunge or whatever. How many people have come to know Christ because you dress exactly like them? What sets you apart? how can they know by looking at you that you are different?
Am I saying I have a problem with the way they dress? no, However, they should be careful when they choose what they want to wear and how they dress. Let me give you an example as to why:
Say you are an unsaved person driving down the road and a car passes you with an Icathus (The fish symbol) On the back of their car. That same car proceeds to cut you off in traffic. Would you really want to listen to that person's witness? No, they act in exactly the same manner as those who are not saved.
This was hypothetical, however it is really true. I have met people who were in the above situation and were very unreceptive to the gospel because of it.
Dressing in clothing that does not edify the Lord is wrong. I got rid of some T-shirts and such that I owned that did not have edifying remarks on them. How serious is someone going to take me if I walk around wearing a shirt that says "I'm with Stupid?" We live in a society where you are judged based on how you dress. I'm not saying that Christians need to walk around in suits and ties all the time, however we do need to take better care as to what we wear and how we are perceived. We need to stand out from the crowd. That is the point of being in the world, but not of it.
Tattoos... Well, Tattoos are something that is between you and God. I don't have a problem with them so long as they are "clean" (No nude women or profanity or anything dealing with witchcraft and the like...) So you had tattoos before you got saved, well what you do with them is between you and God. I have seen some tattoos that were really awesome and some that made me want to retch.
Atown, Your note on gaming was really good.
We do play all those games and do all that stuff. The only question we have to ask ourselves about gaming is... (Yes I struggle with this one a lot) If Jesus were here, would He want to play this game with me?
Alright, I held your attention (I hope I held your attention anyway) for far too long. Let me get off my soap box.