Mine would certainly be
The End of Evangelion. While I've re-sold some of my copies since, I have owned the following at some point of time or another.
Note: Copies not currently owned listed in
italics.
- Japanese "Theatrical Edition" LD box set (KILA-9401)
- Japanese pre-Renewal TV DVD Vol. 7 (KIBA-7)
- Japanese pre-Renewal "Theatrical Edition" DVD (KIBA-105)
- Japanese Renewal "The Feature Film" DVD (KIBA-1001)
- Japanese Renewal rental pressing DVDs (KIBR-9 / 10)
- Japanese Renewal "The Feature Film" DTS Collector's Edition DVD (KIBA-1201)
- Japanese Blu-ray box set (KIXA-90501)
- US Manga Entertainment DVD
- US "The Movies" Manga Entertainment DVD box set