As for me, I shave with the ‘grain’, in a manner of speaking, and not against it nowadays. Put differently, I shave in the direction the hair comes out of the skin and follicle and not the other way anymore.
This way takes more time (for me because I just started using it two years ago), yet works safer and gentler while leaving behind almost always zero nicks, cuts, pumps, or ingrown hairs. In some harder-ta-reach-places sometimes it becomes necessary to come from multiple directions (especially when using cheap disposable razors), which means, of course, one might need to go against the grain sometimes, but for the most part, I find it works best to go ‘with the flow’, not opposite of it.