Never heard of DD.
I never liked SoBe or ROTF.
Some of the old state abbreviations bug me. I learned all the two letter postal codes in 8th grade, and the old ones just seem out of date to me. Example of out of date would be Fla instead of FL.
I don’t know half the abbreviations mentioned above, and since I don’t know them I don’t like them.
There are a bunch I do like. FF, WTF, WTH. I grew up in DC with a dad who worked in the uniformed services, and we use a shit ton of abbreviations in DC, or maybe the correct term is initialism or acronym? All the agencies in DC. NCI, NIMH, NIH, FDA, NIST, PHS, HHS, NIAID, there’s more. Took me a while to get up to speed when we first moved there.
Now, we have text speak, and I still can’t keep up with all of it.