Cool - we ARE in IMHO, anyway.
Just realize, it IS possible that your host might have an opinion that differs from yours. Hell,I don’t think I’d really “resent” someone bringing flowers, but I am likely to not welcome them either. Who are you aiming to please by bringing the gift - your host? Or you because you think it appropriate?
Also, there are all types of different gatherings. If I’m having 2-3 couples over for drinks and snacks, I really couldn’t care if anyone brings food/drinks/flowers/whatever. But if I’m hosting a formal dinner party, for which I’ve planned a menu, bought food and drink, cleaned and maybe decorated the house - please just bring yourselves. If you want to “give” me anything, how about a return invite?
BTW, my sister manages a flower shop. She regularly sends us nice arrangements before various holidays. My wife and I both garden enthusiastically, and during the season we almost always have cut flowers inside. So we aren’t exactly flower haters by any means. Also, since I do enjoy and feel strongly about plants and flowers, I’ll suggest that not every flower arrangement is “lovely” for every situation.
If you want to bring flowers (or food), why not make an offer in advance. It is not unusual for us to be straightening up and prepping food/drink up until right before folk arrive. When people come, we’re hanging up coats, providing food/drink. You might think it a minor thing to vase and position flowers right at that moment, but it might be just one more minor detail that we don’t really need or want to deal with.
How about a guest bringing music to play during the party? Or games to play? Sure, it might be nice to offer, but you might wish to do so beforehand, rather than just showing up with them and offering them in front of the host and other guests. The host might have different ideas as to how they wish the gathering to go.
If this all impresses you as uptight, fine. I’ve been called worse. Heck, invite me to your home, and I’ll enjoy whatever you want to do in terms of food, entertainment, etc. Or if you want me to bring something, just ask.
Yeah, an abused rescue animal is a winner. Don’t forget baby bunnies or chicks around Easter. Or puppies/kittens - especially if the hosts have small kids! 