The feels.
I have them everywhere. My chest, my stomach, my back, my shoulders, even on my damn biceps. It's horrible. The skin issues are the number one reason why I'm still unhappy with my physique and refuse to be shirtless in public.
I also have these skin creases under my chest from slouching while being fat most of my life. Nothing I can do about them save getting a tattoo to cover them up. Thankfully they have gotten faint.
This is usually how it is though. We overthink our own flaws when no one else notices or even if they, don't really care. I've had a couple of guys, during one nighters, bring up the skin issues a couple of times, but never once did they say they were disgusted by it. In fact I actually get complimented more often than not.
Guys at my gym have come up to me and said they're jealous of the stretch marks on my arms because it means they've grown so much (or so they think). So weird.
That all being said. I personally don't regret getting in shape. I'm overall happy with how I look, but I still yearn to look like all the hot circuit dancers on my FB feed.