Last summer was my first foray into cycling. I rode an entry level, all aluminum frame Trek Dual Sport 3 that weighed 32.2 lbs. It served me well, but I could definitely feel the weight on longer (20+ mile) rides.
The wife and I both fell in love with cycling, so this past weekend we upgraded. I picked up a Giant Revolt Advanced Pro 1. Carbon frame and wheels, electronic shifting, and only weighs 19.8 lbs with bottle cages and XTR clipless pedals. The wife picked a Santa Cruz Stigmata with similar characteristics. We can't wait for the warmer weather!