I have "normal" two piece motorcycle rain gear. Each piece rolls up into its own pouch. Used to think it was fine until I started wearing an Aerostitch jacket and pants. I have the Darien Light. I wear it rain or shine.
On a recent six day trip touring Colorado it rained some every day. Some days it poured. The other guys were taking rain gear on and off. Soon as it stopped raining everyone wanted to rip theirs off because it doesn't breath so well.
I was perfectly comfortable whether it was wet, dry, warm or cold.
The stuff's pricey but you'll buy it once and have it forever.