Well, I consider myself an enthusiast also, though probably not an expert my any means... but I've had a lot of experience with brewed coffee for the last 2 years, whilst I've been espresso-machine-less!
I have almost every kind of brewing apparatus exept turkish and a chemex. In my opinion, you are missing a different coffee experience with EACH type of brewing! They are all a bit different, and lend their own special qualities to the cup.
I usually go in phases. Right now I'm in a manual pourover and vacuum pot phase. Before that I was using the Aeropress quite exlusively for awhile. And I've been turning to my french press every once and a while too for that unique experience one can only get from a french press. I find that I need ALL these different types of brewing methods to give myself options, and to keep myself constantly interested and surprised.
The french press will give you an entirely different experience from an americano made with an aeropress. The aeropress makes a very nice, smooth, clean cup. sometimes I really enjoy that. Although I also have found that sometimes the aeropress seems to mute or hide certain flavor layers...so that it's very smooth but some fruity flavors seem to be hidden a bit more. The french press will create a VERY rich full-bodied cup, and usually the fruity flavors will be clear and pronounced. It's not a "clean" cup - but it's a GOOD one. Completely different, and definitely something not to miss out on. I had stopped using mine for a long time, but now I'm back on it, realizing how amazing it can be!
A pourover is also different from the aeropress but in more subtle ways than the vast difference of a french press. It's also a clean cup, but just different. I like using my Hario cloth drip pot too, alternating with my usual paper filter melitta pourover.
In short, I say that yes indeed you should get a french press and enjoy the very unique experience it provides in a cup of coffee, and in my opinion you should try other brewing methods as well. You're missing out on them if you don't!
don't limit yourself to just the aeropress!
mmm coffeeeee. I want some now...