I have two favorites, they are both leather Triumph Retro jackets. One is perforated and one not. They are both very well made and have armour.
The standard is very comfortable in cold weather with just a long sleeve T , gloves and a buff.
The perforated version is comfortable to the mid to upper 90s in summer unless you're caught in very slow city traffic.
Bought the standard for 25% off, about $300. Bought the perforated almost new from someone on this site in 04 for $150.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken