I gather that people were upset by what was a pretty standard metaphysical end to what was, when all was said and done, a traditional space opera. I am not one of those people; the end that I chose for my Shepard fit her actions and her life, and that’s a fair thing to get from any game. No complaints.
Regrets, though? Oh, sure, plenty of those. Starting with at least one NPC death because of something that I did, or more accurately didn’t do.
PS: “Queen of the Girl Scouts;” saved the geth and the rachni from themselves; cold loathing of mass processing of innocents without their consent. Guess which ending I picked.
PPS: This game was great. But you have to play the first two to get the real nuances.