I have the large June Taylor mat on my work area; yeah, it doesn't heal, and I'm lazy about changing blades.... so I have a mat that has a 'bubble 'on the end I work on.... wait... I think I see a pattern developing! And I have Omnigrids in various sizes.
I like the big mat for obvious reasons... it's big, my preference would be to have all Omnigrid mats, BTW these (Omnigrid) don't recover well after a 'pinking' wheel, either..... I read somewhere that you should use the same tools from start to finish on a quilt, so I use the big mat mostly these days.... lazy girl.