What makes for a really challenging life drawing?
Personally I use power tools and they're very hard to draw.
I'm not good at it yet and this is a very rushed study, but nothing really forces you to truly look at angles and perspective more than a power-drill standing on an angle.
What are other household objects that are very hard to draw?
I'm definitely going back to this as soon as I can.
Why bother? Power tools in the essence are nothing more than just cylinders and boxes stacked on each other, get side\top view with proportions from life and then construct it however you wish in any pov you wish.
As for leaves, midrib is key to construction, again, why even bother with that level of detail it is counter-productive, but if you wish, treat it like symmetrical\asymmetrical surface on centerspline-midrib and be done with it
How do I get better at drawing circles?
I only make them look like that because I'm only looking at the object. I think that the better I get at learning how to draw in 3-Dimensions the easier it will be for me to draw my circles.
Should I just try to do perfect circles for a bit?
>nothing really forces you to truly look at angles and perspective more than a power-drill standing on an angle
noobs say the darndest things
A pretty good excercise for circles is using a protracter/tracing a circular object lightly, and trying to to use your arm to trace along the circle 8 times in each direction.
But don't just it mindlessly, actually try to clear your mind and focus on where your pencil is meeting the paper and guiding it where you want it to go. It looks pretty garbage for a while, but of course you get better at accuracy. Once you can do it accurately, work on increasing speed, while still retaining accuracy.
This isn't really something that develops fast, unless you drill hard non-stop for an extended period of time, but I don't know if you want to do that to yourself. (or maybe you do, who knows?)
I find that chairs are a excellent warm up subject for life drawing. They are moderately big so you can study them from the same distance you would with a live model, and usually not too complex in form. When you study man made objects it will greatly expose any weaknesses you might have in your life drawing skills.