Yoga classes tend to be an hour and a half these days. Some are shorter, some are even longer, but usually they're about an hour and a half. I like doing what I do in my class on my own, but it doesn't take me as long because I'm not describing any of it, so I just do it. I find I can do most of what I usually lead in my intermediate class in about an hour. I also like to add meditation to the end of it because that feels right, especially if I haven't already done a meditation and if I don't have anything else I have to do right afterwards.
Traditionally people will do their practice first thing in the morning, before the sun rises and it gets hot. That's not my circumstance here in Ottawa and I have a kid at home getting ready for school, so I always wait until she's out of the house and then I can do my practice. Midday or late morning feels good if my schedule allows. I don't have the stiffness from the morning, nor the hunger, and if I time it just right I can eat breakfast and practice before a sort of later lunch. Some days I just meditate and don't do asana practice. Other days I go to a class someone else is leading.
As I get older, I notice more of a difference if there's a gap in my practice. I get stiff sooner or my concentration goes away faster. So I'm motivated to keep it up because restarting can feel disorienting and sometimes deflating. But sometimes my life doesn't allow me to keep my routine or the order as I like it. And I'm not a victim, I could fight for my routine, but sometimes it's important to let something else in, like more work, or other people! Finding the balance is one of my hobbies. It goes off balance and I try and regain it. I figure I'll always be able to find it even though sometimes I worry that I won't.