I don't like the bigger needles or yarn myself. I find big needles hurt my hands and I feel like I'm knitting with bats. On occasion I do use a larger or smaller needle, but generally I use DK to worsted weight yarn (usually worsted) and size US 5-8 (3.75-5mm) needles. As you can see from the two responses you've gotten so far that it's personal preference.
Right now I have a fingering weight scarf with size US 8 needles and a worsted weight sweater with size US 7 needles.