Clothes for dudes basically comes down to t-shirts and trousers. And for shirts, one's mostly limited to brands, bands, and sports teams. Or, even fucking worse, some pithy comment like "not married and happy", or "have drink, me good", or whatever the feck people find clever these days. I oftentimes default to the H&M look, as it's the least corny looking style I see, and that's not saying much.
Women's clothes have all these cute tops with no shit written on it. There's more variation in colours and shape. You can mix it up by having a half top (whatever you call those). Don't want to wear a top and trousers that day, then wear a dress or a skirt.
Obviously the huge advantage of being a guy is that you can be ugly af, indeed I am an ugly fecking dude, and you're accepted. I assume it's harder for women in this regard, let me know if I'm wrong.
Leggings are cooler? I did not know this. They look warm to me.
There's different kinds! Some are warm fleece, some are knitted polyester and it feels like wearing nothing at all~
Hope the reference isn't too old
Really, really heavily depends on the material. Summer weight wool fabrics don't really exist anymore, but a good summer wool is mindblowingly superior to cotton or synthetics for leggigns. Linen is also very good for it's sweat wicking and evaporative properties but it tends to be inelastic and less suitable for leggings, especially if they need to be hard wearing.