It probably depends more on the brand and how you like your jeans to fit.
My dad wears his jeans so that they don't quite cover the tops of his shoes. I wear mine so that they cover the tops of my shoes and a little extra.
That's true. I used to try and cover my footwear a bit with my pants, but that wearing what amounts to baggy khakis to work almost seems too unprofessional. I used to wear 32", but that would probably explain why most of my pants were frayed at the bottom... they kept slipping under my heel. I then dropped to a 30", but as mentioned above, they were still a little baggy.
I bought the 29" ones this past weekend, and they definitely do seem a bit more professional.
As for the brand, I mostly wear
Haggar Cool 18 Khakis. I love how lightweight they are. Sometimes it feels like I'm not even wearing pants! :$