Crossed vs. radial lacing:
- If the wheel has to bear torque (drivetrain torque or disc brake torque), the spokes should be crossed. (Note: Generally only the spokes on the side that torque is applied need to be crossed, i.e. the right side of a rear wheel, and the leftt side of a disc brake wheel.)
- Radial lacing loads the flanges differently than crossed crossed lacing. If hubs are not designed to handle radial spoke forces, the spokes should be crossed.
- If a spoke breaks, it is less likely to flop around as the wheel turns if the spokes are interlaced, and interlacing requires crossed spokes.
- Radial lacing is marginally easier to build.
- Radial lacing is marginally lighter.
- Radial lacing marginally increases lateral stiffness.
- Radial lacing marginally decreases aero drag.
In the end, there are only minor differences in performance and durability between radial vs. crossed spokes, so if you like the look of radial spokes, that's reason enough to do it.