All clownfish can be aggressive, but I wouldn't want a tank without them.
I love my saddleback an really don't want to let her go, but I think I like my ocellaris pair more and will only have one tank up. I ended up making a home for my ocellaris when I got rid of my nano in my qt , and now I just have another nano complete with kessil lighting live rock coral and macro algae. So I accomplished nothing except now I don't have a qt!
But my advice is just get the ones you really want. Sure maroons can be a pain but so can ocellaris or percula, although I would go with one of the latter personally, that doesn't necessarily make the maroons a bad choice if you felt strongly enough about them.
It's all about compatibility. If you want aggressive fish that's not a huge issue, you just have to plan your stock list accordingly. I probably can't have another wrasse with my mystery wrasse, but I'm okay with that, because I really like the mystery wrasse!
It's only an issue if I later on decide I want something else, but I would have an opportunity to rehome the fish when I switch tanks. If you're planning on your set up running for years, always consider what you put in because you may not be able to get it out
