Zeta Gundam, Kodomo no Omocha, and so on. I bet someone will call me shallow, but I have my reasons.
I’m not balls against any sort of changes, as I understand that it’s silly to want, say, original Japanese credits, and despite scrolling English credits often hurting op/ed sequences sometimes (in my opinion), I know and accept its existence.
Opening and ending themes (not to mention music overall) are different, though.
When I buy a DVD, it’s a one-time thing. I am buying this collection for archival purposes, and what I want from my archive is authenticity. OPs and EDs are very much a part of an anime’s identity, and to remove them is to make the product inherently flawed. I know there are always legal/monetary reasons behind these decisions, and I feel for the anime companies, but it doesn’t mean I have to like the result.