?为所欲为

... get one's money's worth 花钱合算 get one's own way 为所欲为 get one's troop 晋升为上尉 ...

?随心所欲

... by the way 顺便说一声，顺便问一下(口语中转移话题, 或让严肃的问题随意) on the way 在去...的途中(陈述句) get one's own way 随心所欲 ...

?想怎样就怎样

... get on上（马、车、船、飞机） get one's own way想怎样就怎样，任性，一意孤行 get on one's nerves使人不安；惹恼人；刺激神经 ...