I like cartoonish style stamps of kids and animals and I have quite a few favorites: Bugaboo Stamps, Digistamp Boutique, Stamp Fairy, Melaina Deasy Designs, SK digis, Birdie Brown (aka Torico), All that Scraps (esp. CC Designs), Whimsy Stamps, Saturated Canary, Sweet n Sassy to name a few
All of these post at least once a week, some every day. If you need the links, let me know. There's also a top 100 site that lists many others topdigitalstamping.gotop100.com