I'd say variations of 18/21 and 21/18 are the most standard, with a decent amount of 24/15 and 15/24 builds.
I feel like we also have quite a few min maxers, so you're likely to see builds that focus on just two skills (athletics, power strike, 3 leftover points; power draw, weapon master, 3 leftover points) such as 18/24, 24/18, 15/27 (my current build although it's built for 31+), 27/15, or 21/21 a decent amount as well.