Hold'em table

On the button with king-high and two blinds behind, a standard 3bb open leverages position and fold equity; K5o is marginal but playable as the aggressor with a 100bb stack.

Q4 offsuit is too weak to continue out of position against a button open; folding avoids paying 250 into a dominated, low-equity spot.

A2o realizes equity poorly out of position against a 3x button open, making it a standard fold.

A6o is a standard button open in three-handed play; raising to 2.5bb builds the pot with a playable ace and positional advantage.

Holding KJo in the small blind against a button open, a 3-bet to 1000 applies pressure to wide opening ranges and utilizes strong blocker equity.

85 offsuit is nearly the worst hand and I face a raise plus a large 3-bet; even with pot odds my equity is far too low and I'm dominated whenever I connect. Folding preserves 9900 chips for better spots.

A6o is too weak to continue against a 10bb three-bet; the ace is often dominated and the price is not good enough even in position.

T6o is too weak to profitably open from the button even in 3-handed play.

Heads-up after the button folds, Q9o has strong equity and plays well as an SB open. Raising to 3x applies fold pressure and builds the pot when called.

96o is too weak to continue against a preflop raise heads-up; folding avoids putting more chips in with a dominated offsuit hand.

Suited connector on the button with full stacks is a standard open; raising to 3x builds the pot with position and applies pressure to both blinds.

A2o is too weak to continue out of position against a button open, with the big blind still to act. Folding avoids a dominated ace and a poor postflop spot.

Q9o is too weak and plays poorly out of position facing a 3x button open.

Q8o is playable from the button in three-handed, so I open to 3bb rather than fold a hand with decent high-card value and position.

98 offsuit is too weak to defend out of position against a 3x button open with the big blind still behind us.

2d6c is one of the worst hands and is heavily dominated by a button's 3x raise range; calling 200 needs ~31% equity which this hand won't realize out of position. Folding is clearly best.

K5s is comfortably within the standard opening range on the button in 3-handed play.

T6s is a weak hand facing a 2x open from the button out of position; folding the small blind is standard and avoids playing a marginal hand multiway.

73 suited is too weak to continue out of position against a button raise after the small blind folds. Folding avoids a dominated, poorly realized hand.