Mine is "1984". It was their biggest album and their last with original lead singer David Lee Roth until 2012.
1984 (stylized as MCMLXXXIV on the album's front cover) is the sixth studio album by American hard rock band Van Halen. It remains Van Halen's most successful album in terms of sales, with 10 million copies shipped in the United States, and U.S. chart performance. 1984 reached number two on the Billboard 200 album chart and remained there for five weeks, behind Michael Jackson's Thriller. It produced several memorable singles, including "Jump", which reached the top of the Billboard Hot 100 singles chart, the top 13 hits "Panama" and "I'll Wait", and the MTV sensation "Hot for Teacher". 1984 was the last, full-length Van Halen album to feature the band's original frontman David Lee Roth until 2012's A Different Kind of Truth and the final full-length album with all four original members.