Yo Gabba Gabba is my daughter's favorite show and my husband and I love it! It's focused on things preschoolers really need to know (i.e., don't bite your friends) with a realistic perspective for kids (i.e. it's nice to win, it's ok to lose).
The non-sequitur cartoons alternate between retro and ultra mod, but either way are consistently fun and quirky. And although the music can be, well, mind numbing, the songs are surprisingly catchy and the lyrics are simple and repetitive enough for a toddler to really master them.
As a plus for parents, hip bands and celebrity dancey dance friends are featured in every episode. And besides, who can resist the adorable sight of your preschooler attempting to beat box along with Biz Markie? Not this momma!