cherrybim,
Halachah is not a free-for-all. There are very specific halachos about which psak one must follow.
See gemara Avodah Zara 7a “B’shel Torah” etc.
On a D’oraiso we follow the stringent view, on a D’rabonon we follow the lenient view.
See also Chazon Ish Y.D. 150 (beginning) for when one follows his own rav even when he is more lenient.
“Don’t take this the wrong way”, I am not paskening for you, but I am trying to make you aware that the only thing in this area which one can choose is who to accept as his rav, (also within limits) but not which psak he finds more convenient “if his regular rav/posek does not assir.”