I'll have to admit, once I was in the 180's, things progressed visually A LOT faster. Also, size wise. I'm 5'7", but still... I was in 12's at 189-185, 10's from 184ish to about 178 and now 8's.. which are getting baggy. I'm an apple, though, lol... Sigh.
Anyways, visually. I noticed the muscles in my arms in the 180's, I started to be able to see my hip bones when I lay on my side or on my back. Weird stuff.. but yes, 180's are freaky - but in a great way!!