I own 4 portly mountain bikes (32.6 thru 40 pounds) and one lightweight Trek 2.1 road bike (21.4 pounds with 700 x 28 tires). Each bike has a different gearing range which tends to make one more proficient for a given route’s terrain. Additionally, I sometimes elect to use the bike with the most limited low gearing on a particularly hilly route to increase my cardio workout.
Two of my mountain bikes have a suspension (one’s a 29er hardtail, the other a 26er dual suspension), so they’re all useful in their own way which keeps me riding all 5 of them alternately. Those with the lowest gearing tend to be my longest distance bikes (i.e., my 200 and 250-mile mountain rides).
The 40-pound Mongoose dual suspension bike is my choice for my 7 and 13 mile grocery runs because its suspension soaks up the bad patches of roadway and makes bumpy railroad track crossings quite smooth, which is appreciated when carrying up to 52 pounds of groceries on my back via my 40-year-old U.S. Army duffle bag.
Biker395, 80,000 miles is an awesome mileage count let alone for a single bike. Way to go!