I would not have considered porcelain before reading this forum. I just didn't even think of it as an option for a garage flooring. Friends of mine have expressed concerns about the floor cracking or chipping and before starting the flooring project I had to convince myself this wasn't going to be an issue so I studied up a little bit. Most people's experience is with standard ceramic tiles made for light abuse like a dropped pan but the porcelain tile with PEI 4&5 is super hard and is very resistant to wear. However, even if you manage to chip the tile it's hard to notice with the color through, and if you do end up dropping a boulder on a tile and cracking it, it's pretty routine to replace it.
A plain old porcelain tile floor looks great, but you can get creative with it also and make some cool patterns such as Dakota00's floor. Porcelain tile also comes in every type of look now like stone or wood. I think a garage floor done in the wood tile would look great.
I'm not sure why you don't hear more about using porcelain tile as an option for garage flooring, it seems like a no-brainer. The go-to surface seems to be epoxies, which I think also looks good, but prices for going epoxy vs porcelain are comparable either having it professionally done or DIY.