Design, quality, and price...
Sometimes, just the littlelest thing on a shirt will intrigue me...and I'll buy it...sometimes the lining of the inside color will be a different color etc etc.. just small things like that...
Quality for sure... you know, I don't really buy expensive stuff..because at the end of the day, it's just clothes.. but you can tell a diference in quality from more expensive stuff to less expensive stuff..
One day I was walking thought this outlet store... sacks on 5th or something like that.. they got expensive stuff and less expensive stuff...
I saw two button up shirts... the look the same, had same design... but the more expensive shirt you could tell the stitching was better, the cloth was better... the cheaper one, well to be honest it just felt cheaper, the cloth was thinner, the stitching was not as strong or tight and seemed like the threads was already loose and going to undo itself... I bought neither but it really did make me realize the phrase you get for what you pay...
and obviously price.... now price, it just depends on what I intend to do with the cloth...if it's just something I'm going to work out in, lounge around the house, get dirty, etc etc.. anything cheap will do!
But if it's something that I care to look decent and presentable in, I'll fork out a couple extra bucks.