
I just played through DS 1, 2, and 3 for the first time. Here are my boss attempts for Dark Souls 3.
I played completely blind with the exception of the knowledge to hit Curse Rotted Greatwood in his balls and to hit High Lord Wolnir in his bracelets. I used the same playstyle as my DS 1 and 2 playthroughs, which is two-handing a straight sword and only sprinting and rolling. The only exceptions were Pontiff and Yhorm. I used a shield to parry Pontiff because he was starting to make me angry. For Yhorm, I realized I was doing very little damage and immediately thought that there must be some sort of trick for him. I then looked it up and I was right, so I used the sword they give you and used its ability.
I enjoyed DS 3 the most out of the three games. I think it has the best boss fights. I found Dark Souls 2 bosses to be way too easy. I also enjoyed the faster-paced combat of DS 3 more.
DS 3 also has much easier non-boss areas. DS 3 is very streamlined and was also the fastest game to beat for me. DS 1 play time = 37.4 hours. DS 2 play time = 33.7 hours (according to Steam), but DS 3 was only around 25 hours (I'll need to look at the exact number later [Edit: Just checked. It's 23.7 hours]).
I also think DS 3 has some of the ugliest and most beautiful areas. The beginning areas were so bland that it made me question to even continue playing, but they later became much better.