I dunno if it's just the global buffs but I'm crushing mining level and lots of inventory with flat, best xp, fastest which means plenty of everything and no need to trade. Mining level has it's own intrinsic benefits and even being put on a crap node is more xp and faster than most ores. Density is key for sure if you go flat, or maybe I'm just lazy and don't like trading ore for every Corp event/what I need for some reason.

What did you guys pick and at what level did you confirm you chose right or wrong?

Either way, global buffs really leveling the playing field for newer people lately.

I use single ore as I have too many ore injections left ... after that thinking to go flats only ... in like 2 months ...

i think flat is better for higher lvl miners

starting off prolly better to go 1

What u mine if u have masteries doesnr care (expertise). For starting char its better flat and you dont lvl mining masteries at all ...