So while you test two or three rolls of every film out there, what are you actually going to learn? I say not much. You will get a first flavor. Nothing more.
Until you spend a long time with one single film, you will not realize its full potential. Far from it. So how are you going to know if you like it or not?
I maintain that it is MUCH more important to learn HOW to use the materials than WHAT materials to use. (Sorry for the emphasis, but this is a very important part of it).
If you pick any film from Ilford, Kodak, or Fuji, you have an excellent film no matter what. None of them are bad. Most of them can be tweaked by altering exposure and development to look almost any way you want them to.
By using just one film you will learn it intimately. Switching back and forth is going to be confusing, because how do you know what to look for?
I'm very serious when I say that it takes a long time to tune in a process, and looking at the whole chain, it all starts in your head, right? You have an idea. If you don't know what to expect from your materials it will become much harder to realize your vision.
Then there's the paper. You want to pick that first, and then your film is treated and processed such that you can make great prints on your paper of choice. You learn how to tweak all of your processes, because you know your materials INTIMATELY. You will be able to get the results that you want. This isn't much different from scanning negs for digital output either.
Switching films is going to alter the whole chain of your process and you introduce a bunch of variables that get in the way of seeing.
Basically, you shouldn't have to wonder about your materials. All you need to worry about is seeing, and putting your vision into fruition. That is the most important thing, so that we can go make pictures. I see talking about lovers - you should be in love with what's in front of the lens and what's in your head. That's all you need to be in love with.
My own example is that I did try every film and developer under the moon. I did this for four years. What did I learn? Not a whole lot. Then I met a couple of photographers, two teachers and one very experienced portrait photographer with a little over 100 years of experience between them.
It took some 'conditioning' but now I feel like I truly understand my process and how to apply it. I use one film, one developer, one paper, one print developer, and on the side a bunch of toners and some lith printing materials. The consistency within my materials has helped me make, by far, the best prints I've ever made in my life. And it is due to consistency and learning my materials and how they respond to varying treatment.
For example, you have to learn how the film responds to filtration, night time photography, long exposures, bright sunlight, overcast - I'm sure I'm missing a slew of conditions, and then you also have to learn how to process your film so that under each of these conditions you get cohesive and usable results.
I'm sorry this post is so long, but I really believe that it's HIGHLY important to get to a point where your materials are non-factors. It should be intuitive what you have to do at the moment of exposure. You should be able to feel what you should do, like second nature. If you have to wonder too much about the results, you are in fact distracted.
This is my perspective, and it may not work for everybody.