I thought I just had a weird cat - but Mercy'll play fetch all the time too! Only with the soft, bouncy balls mind. Spend 30 minutes every night throwing it down the hallway or up the stairs before she lets me go to bed! I just thought she'd been brought up around dogs or something before I got her
She's never climbed anything in my place except the cat tree but when she stayed at my grandparents she decided to use their floor length curtains as climbing practise, made it all the way to the top & then happily jumped back down for food :O