I shave my legs. I started when I was 17, a Junior. Back then, definite peer pressure was at play with my Team and Club. I stopped in my early 30's when I no longer raced.
3 Years ago, I started shaving again because I race again; MTB and Road.
I do so because I find it helps me keep cooler - at least, it feels that way - in the warmer months and here in Portugal's Algarve region, we have over 300 days of Sun each year. I apply massage creams after hard training, I use warming lotions in Winter, I go to a Masseuse for a sports massage during racing season once a week. It all feels better shaved.
I had a crash 3 weeks ago, a 55km/h+ sprint accident where my chain came off and I hit the tar. I had Winter clothing on which took a beating and saved me from more severe road rash - but what I did get is all but gone now, healed quick, clean, no issues. I'm only just back on the bike nursing tendon strains but all going well and I'll be training again soon.
On my Club rides we have guys who don't shave, never will. Each to their own. Certainly there is no peer pressure among our Group and half the people who turn up for MTB racing don't shave. Personally, so long as I'm racing, training hard, I'll prefer to shave. When I eventually slow down and just ride for general fitness, the scenery and fresh air, maybe then I'll stop doing so again.