As the boys get a little bit older, the strollers are becoming more and more obsolete. Don't get me wrong, we still use them quite a bit, especially when it's necessary to contain them (like for running errands, trips to the pediatrician's office, or taking the puppy for his walk).
But, if you give them their choice, they prefer to walk.
And when we can, we encourage that. Sooner or later, they're going to have to learn to listen when we say things like "wait" or "slow down" or "come on" - they will eventually outgrow the strollers altogether. The only bad thing about letting them walk is that the two little guys, while pretty much identical on the outside, have totally opposite personalities, especially when it comes to walking.
Xander is always really excited to go for a walk, and he walks as fast as his little legs will carry him. He's usually several yards ahead and is constantly asked to "wait" or "slow down" so that his brother can catch up. He doesn't do so patiently. It's just not in him, with his quick flash of temper and constant energy.
Sawyer also loves to walk, but like so many things, he likes to do it in his own time and in his own way. He's slower, taking time to look around and study things a bit more. He also likes to back track, to go back and see things once or twice more before he moves on. He is especially partial to the way light reflects off of glass, like storm doors or windows. He cannot get enough. All while Xander continues to pace away.
It's hard to reconcile those differences. And it won't always be just in the walk around the block.