Most everything I have are skate brands. The only thing I don't invest in is pants. Skate pants are crazy expensive. I've had skate pants as a kid, and I loved them, but they never lasted me. I stick to Levi's and Dickies. The skate pants I do own, I found at TJ Maxx and Ross, or something along those lines.
Only articles of clothing that I have that aren't skate related is a Carhartt vest, some plain shirts, a couple sweatshirts/jackets, and any sports apparel I have, and most of my pants, as I mentioned above.
For long time I didn't wear a lot of skate stuff. I didn't like anything that was out for a couple years. Those were the couple years I didn't skate much either due to bad knees. Ended up getting into a brand called Rebel8. Their kinda lame now, as you can go to any mall and find their stuff at Zumiez, Tilly's, etc. But, before they got super big, they were making some really good stuff. The artist who does all of the graphics, rules. He's a renowned graffiti and tattoo artist.Draws everything with a Sharpie. He actually got his start with Think skateboards. Pretty sure he was the one who created their logo. The yellow and red colors of Think, that was all him. And he's colorblind. Dude rules.