have wanted to do/ have been wanting to do

It is not about what is common per se but what is correct.

The difference between I have been wanting to go there and I have wanted to go there is that the continuous form of the present perfect focuses on a process, something that has been happening over a recent period of time, while the simple form focuses on the end result of something that happened.

This is better understood with an example.

I have been wanting/taking too much alcohol lately. This means that in recent times and still now I drink or want too much alcohol everytime I get an opportunity.

I have taken too much alcohol. Here, the action is finished.

Present tense in the continuous form, focuses our attention on a series of events that began in the past, continues into the present, and may extend into the future. It is this continuing series of events which is important. Present tense in the simple form, focuses our attention on the current situation or result: that the drinking and alcohol are both finished.

Read this to understand better the usage of present perfect simple and present perfect continuous.