I haven't raced in 30 years, and don't do the hi-tech cycling getup-plastered-with-logos thing. I like cotton or cotton/lycra, and I like it on the loose side (sports bra excepted). My tights and shorts are cycling-specific lycra blend from the bike shop, a little loose fitting; my t-shirts are regular off-the-shelf cotton T's from my favourite clothing store. Somehow I do manage to buy ones that match my bikes' colours.
Can't handle tight fitting clothes, no matter what fabric. The only downside I've found to loose fitting/baggy cycling clothes is wasps and bees can get in and sting in unfortunate places. (usually flying downhill at terminal velocity.....I've had bee-vs-boob encounters at least once a summer lately
)
All vintage, all the time.
Falcon Black Diamond
Gitane Tour de France
Kuwahara Sierra Grande MTB
Bianchi Super Grizzly MTB