I started using flavors of M1 5W30 a while back because VOAs indicated that they had additive packs that looked likely to help minimize LSPI in my DIT engine...felt pretty smart after my car was recalled for LSPI by Subaru.
With d1G2 and SN+ now (and GF6 on the horizon), I feel pretty comfortable with most brands but have run M1 0/5/10W30 and PP/Valvoline FS 5W30 lately.
I get good rebates from XOM and SOPUS and tried the Valvoline without a rebate because I was interested in its high HTHS for a GF5 5W30 as well as its low Noack loss.
Subaru specifies full synthetic for my car and I don't see any reason to not follow that, although I did run one OCI of Pennzoil Gold 5W30 blend because some of its published performance specs looked outstanding and it was d1G2. Probably wouldn't do that again.
Also change the oil in my daughter's car and she has gotten mostly M1 0W20 AFE with some PP 0W20...again, good rebates and everything I can find about these oils suggests they are very high quality for the $12-13 a jug I end up paying for them.