my betta eats any food that gets in the tank rather that being picky, he's a glutton. though he doesnt fancy freeze dried BW that came in the flake food. it could be that i give him frozen ones. i use the nutrafin max flakes, got a 15g container + a 3g bag of it. would put it in the container but its pretty full. my friend's betta was a pellet fish and hated flakes.
i find flakes relatively easy to feed, i take 3 large flakes or a combo of smaller ones. though thinking how they'll gather in its stomach is hard to measure. i do have a nagging feeling the pellets i like are probably less nutritutional than wardleys.