Good first car for a new college grad

Stay away from German cars if that is what you have in mind. I am sure you know that 90k a year will not go far at all in the bay area. I would look at clean used Toyota's or Honda's.

It's my first job out of college. I'm aware that 90k won't last me long in the Bay Area but as a new grad who is still living at home with parents and paying no rent, I think it suffices :)

Older Camry's and Lexus ES models may be a good choice. The lexus likely running you closer to 11-15K depending on mileage

Living at home will be a huge boost to your living standards. I would look at new car, perhaps a new Camry or Accord.

Any ideas as to how much I should be spending on a first car? Minimums/maximums? How much would you honestly spend if in my shoes?

Your budget is your business. Talk it over with your parents. You can get a decent new car for around 25k. I personally would stay away from the tiny econo boxes. Shop online as all new car manufacturers have web sites. Keep in mind you can get substantial discounts off list prices.