wired up

delicate dicey hypersensitive jumpy precarious risky sensitive testy ticklish tricky uptight volatile

bad-tempered bundle of nerves cantankerous captious choleric crabbed cranky cross grouchy grumpy hazardous irascible irritable mean ornery oversensitive peevish perturbable pettish petulant querulous quick-tempered splenetic surly temperamental thin-skinned unpredictable unsafe wound-up

calm collected easy easygoing insensitive laid-back unflappable