I bought the Yaris to replace my 1999 Honda Civic and I can honestly say I could not be happier. The gas mileage is slightly better, but the overall comfort is amazing. The first day I drove it to work everyone commented on how small it was, then wanted to buy one for themselves when they sat in it. It is SO roomy inside, more roomy than my Civic, and drives very smooth. The body seems solid on the interstate and it hugs the roadway. I was surprised to find how high it sits. There have been many times when I am sitting at a red light and a crossover or SUV pulls up next to me and I am eye level with the driver, and I'm only 5'4". It makes me feel much safer.
Body style, perfect size for student and passenger, design, ride quality, height.
The plastic interior does seem to scuff easily, but it is wiped away very simply with some armor-all or a wet wipe. The back windshield (I think) rattles when I go certain speeds, but it may just be my storage container in the trunk.