These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ho Yay: Sledge and his best friend Sidney Phillips. The homoerotic subtext between these two "best friends" is just too obvious to ignore. Their reunion in Part 5 makes it more blatant
Agreed; they laid the Ho Yay on thick in Band of Brothers with Richard Winters and Lewis Nixon, but this isn't just subtext: it's outright TEXT
Sledge/Snafu seems to be popular in fandom as well. The fact Snafu seems to have no concept of personal space when it comes to Eugene just adds fuel to the fire
Hello, the oh-so-wonderful scene with the letter about Sledge's dog makes this practically canon.
Snafu's fixation on Sledge in general, though it comes off as a bit one-sided.
Strangely enough, Ack-Ack/Hillybilly. They have such little screen time together, yet a good part of the fandom still ships them.
Probably has something to do with the fact that every time they're on screen they're together, and Ack-Ack's seemingly heartbroken reaction to Hillbilly's death.
Leckie/Hoosier has a solid fanbase as well, mostly because of Leckie's (sarcastic) declaration of wanting Hoosier to be his date if they ever have a fancy dress ball on the island, and Hoosier's amiable response
Nightmare Fuel - The wounded Japanese soldier committing suicide while Marine corpsmen were helping him following the night attack in Part One with a grenade.
Familiarity with the history of the Pacific theater really doesn't make things like this all that surprising. There were some very pragmatic reasons for the Marines in the field to adopt a "take no prisoners" attitude against the Japanese
A group of Marines are found blown up and dismembered in a crater; one of them still has his head, but not his face, which was a few feet away
Snafu digging out a gold tooth of a dead Japanese soldier with his Ka-Bar. Bonus Nightmare points in that he was just eating with it beforehand
Snafu dropping pebbles into the pool of brain matter/blood that's left in a Japanese soldier's head, the top of which has been blown off
Earlier, another Marine attempts to take gold teeth out of a STILL LIVING Japanese soldier. Snafu comes over and puts him out of his misery... then says to Sledge, "It makes it easier." It's hard to tell if he was joking or not
The real event, as documented in Sledge's nonfiction book, "With The Old Breed" was even more nightmareish. The Marine, on finding it so difficult to dig the still living man's teeth out, slashed both of his cheeks wide open to make his hunt easier. As the Japanese soldier sputtered and coughed his own blood, the Marine kept digging. Only then did someone put the man out of his misery.
Peleliu as a whole: some marines have described it as the most horrific battle they fought in the entire war
The Iwo Jima landings
Every single second of Part 9; just watching it will make you get post-traumatic stress disorder
Okinawa is the definition of this: constant rain to the point the ground got so muddy corpses began to sink underneath so all you could see was a skeletal hand with maggots eating it. The island had the highest casualties of the Pacific War on both sides. Even the civilians inhabiting Okinawa were not only caught in the crossfire, but were used as human shields by the desperate Japanese.
Sledge falling into a watery, maggot-filled machine-gun nest with a rotten corpse deserves special mention
Anything involving Okinawan civilians
One-Scene Wonder: He's only in a few episodes, but Gary Sweet as the Gunny is a pure comedy/badassery package every second he's on screen.