My favourite architectural styles are:
Gothic and Baroque have to be my absolute top choices though. They are somewhat opposed, but each have their own charm. My parish is a Romanesque church.
There are multiple reasons I like those two styles. I love Gothic architecture because it takes me back to the ages of old in mind. It gives you that sense of “This is how many Saints and faithful worshipped long ago”, as though you are right among them. They are a beautiful reminder of how old our Church is and that there is continuity. At the same time, the Gothic architecture is very ordered, structured and thus hints at the Divine Mind, that God is a God of order and beauty. And, boy, the massive stained glass windows and the light! Gothic architecture is all about the Divine Light. With its emphasis on height, it causes the pilgrim to look upward as well.
I love Baroque churches because of their sheer opulence. In my view, there is never too much splendour for God. Baroque combines Classical architecture with grandeur.
The two styles of Gothic and Baroque are somewhat different in essence, I find. Gothic churches tend to seem much emptier than Baroque ones. The latter only makes sense with lots of art and statues, while the Gothic building (on the inside, the outside is a totally different matter) has a lot less. There’s decorum alright, but not in the Baroque way.
I will attach a few pictures of some examples of what I love.
By the way, for fantastic images of French Gothic churches, go to mappinggothic.org. On the top left you can access a map of all of France’s Gothic churches with thousands of high-resolution photographs. While you’re at it, but on some Gregorian chant like this and indulge in them: youtube.com/watch?v=74d3gWJOV-4