Shawn,
Shawn,
We get into the realm of taste and preferences here, admittedly. Strictly speaking, one can worship God in casual clothing.
But like most things, we need to think more deeply and carefully.
One of the things people won't tell you directly often is that their impression of you is influenced by how you dress. Some will judge your seriousness, respect by how you dress.
Books like "Dress for Success," and classes about that are there for a reason.
One biblical principle is that corporate worship is not focused on us. By derivation, we might ask- does the way I dress foster an atmosphere of holiness, or does it distract. Does it call undue attention to self?
This touches on biblical concepts like modesty, not causing a brother to stumble, even things like good hygiene that affect personal health, attitude and that of others.
I understand,I don't dress casually to all events because certain events call for certain attire,but seeing how church fellowship isn't not dependent on attire,I really cant ever see myself in going back to "dressing up" to church.Ironically I love wearing suits and things,any of my family can testify for that,I always get compliments on how well i'm dressed from different people.I saw dressing up for church regularly as a stumbling block for me because when I would invite friends to worship at morning service,the number one excuse is "I dont have anything to wear."I dont want them to feel they have to dress up to impress certain people,that's the way the world works not Christians.Im not one of those who will say wear anything,of course keep it in moderation(especially ladies) and everybody should be aware that running around with poor hygiene is a problem

but even the world can get those things right.
Some of the most well dressed people now and in history have done some of the heinous things look at these prominent,doctors,politicians,government officials,entertainers,drug dealers etc. all people who wish to dress up for the occasion.I have some of the casual dressing friends who are Lord fearing Christians who are serious,Christ-centered in their walk and theology.Have you ever met any of those christian rap guys like Lecrae,Flame,Trip Lee,Shai Linne or others? They always get noticed how much zeal,humility and piety they have,how theologically sound they are,but yet dress so urban!No they dont sag,that's played out any way

or wear ridiculously big clothes,but they dress casual.Even look at some of the sound reformed preachers coming out today,look at the guys coming out of seminary today with a passion to glorify and serve God.I honestly think our generation is going the generation where moderation principles will be applied but "church clothes" will vanish overtime