My Rabbanim have taught me not to go to one Rav for everything. There is almost no one today who is an expert in every area. You are supposed to go to different Rabbanim for different types of sheilahs, depending what his area of expertise is.
And it is a good idea to find out what “Daas Torah” (i.e. the Gedolim) have to say once in a while, especially if it’s a controversial topic.
And asking your LOR can’t be used as an excuse for doing something against the Torah (as it unfortunately often is). No LOR is infallible. If your LOR tells you something that seems to be against the Torah, it is your responsibility to look into it and find another, greater Rav to ask. I don’t want to start giving examples since I’m afraid it will get into Loshon Hara, but people often use their Rabbanim as an excuse to do things that are clearly assur.
Your LOR is not a Gadol (unless he is), and everything he says is not Daas Torah (unless he’s a Gadol).
I hope it’s clear that I’m not talking about shopping for leniencies her – I am talking about searching for the truth.