When I look for clothes, I usually have a peek at the men's section as well. In general, men get more basics, fewer weird embellishments, better quality, and functional pockets. My friend (who is also an avid men's section shopper) and I were discussing what clothes are best to buy from the men's section and which to stick with women's, and here is what I concluded.
Jackets. You probably know this as my favourite jacket, it's from the men's section at Uniqlo. It fits me almost perfectly. There's an inside pocket which can fit a small novel and all the outer pockets are velcro shut so I can put my things in there without worrying (and there are also open side pockets underneath the lower two which you can put your hands into). So yes, check out men's jackets, if only for the pockets. When the time comes to replace my wool coat or trench I'll probably look in men's first as well, but I suspect those might look a bit too masculine.
Button down shirts. This is another from Uniqlo. At the time I bought it I liked my shirts slimmer, and because I have quite wide shoulders, all the women's shirts that fit would be loose for the rest of my torso. So a slim men's shirt gave me the fit I wanted. The sleeves are a bit too baggy though, and the button placement is a little awkward for wearing it open (two buttons undone doesn't look undone enough but three is too many). Since I like my shirts more relaxed nowadays, I think I'll stick to women's button downs from now on.
Jumpers. The left is a Jack and Jones one I got on sale on ASOS. It was pretty cheap from what I remember, and it's held up really well after all the hell I've put it though as my go to travel jumper for the last few years. I find it okay to wear on placement over a more formal looking outfit. The right is a Ralph Lauren one my dad gave me. I love it but it's too casual and oversized to wear on placement. Yes to men's jumpers for something chunky and oversized; for thinner, more work appropriate jumpers I think I'd stick with women's jumpers.
T-shirts. Both from Uniqlo. I actually prefer the fit of men's tees over women's, with a higher crew neck, longer sleeves and and straighter in the body. I took both these travelling with me, and I think the stripes on the shoulders have faded from being in the sun all the time in Tanzania. Another yes to the men's section.
In terms of jeans and pants - men's pairs definitely don't work on me. "Unisex" jeans don't even work on me. There's so much material but not enough space? I have no idea. As for shoes, I've never particularly wanted men's shoes (I guess my Docs are technically unisex though).
That is my men's clothes summary. For reference, I'm an AU/UK size 10-12 (US 6-8) and I wear a men's XS or S. I'm 5'3" so things are a bit long but that goes for most women's clothes as well. I've worn the pullover, cardigan and parka in this outfit roundup if you want to see them on me.