My female sheltie used to sleep in the little cat bed...of course she overflowed but it didn't seem to bother her a bit. She was also fond of sleeping in my DGD's little foam chair. She'd put her head in it and then overflow to the floor.
My Ragdoll cat likes to sleep wherever I am. She loves to sleep on the back of the couch when I'm sitting. She puts her paw on my face or her face on my shoulder to sleep. When I go to bed she runs after me and either sleeps in the crook of my legs or up my side (I am a side sleeper). When I turn over she just rearranges herself and goes back to sleep.
Diannia