It's no secret that there's a deep animosity between Van Halen -- particularly their leader, guitarist Edward (formerly Eddie) Van Halen -- and their former frontman, David Lee Roth. His 1985 departure was acrimonious, and while his solo career paled in comparison to Van Halen's continued success with Sammy Hagar as their frontman, the group never escaped the shadow of Diamond Dave. No matter how many number one albums and singles they racked up, no matter how many shows they sold out, fans and critics alike preferred their gonzo days with Roth, and kept hounding the band for a reunion. Edward held his ground for years, but once the band stumbled with 1995's Balance, he reconsidered, courting Dave for an ill-fated mini-reunion for the 1996 hits compilation The Best of Van Halen, Vol. 1 -- a move that resulted not just in two enjoyable albeit underwhelming new songs, but also the alienation of Sammy, who left the band over this issue. Van Halen recruited Extreme vocalist Gary Cherone for 1998's Van Halen III, but instead of offering a new beginning, the album torpedoed the group's career, losing them fans and eventually their record contract. Years passed with no activity from the band, and the silence whetted the appetite for a reunion -- which for many meant a reunion with Dave, not Sammy, but bad blood can run deep, so when Edward pulled the rest of the band together for a comeback tour in 2004, he chose Hagar as the frontman. To promote the tour, the band assembled a new hits compilation, the double-disc, 36-track Best of Both Worlds. On the surface, this seemed like an ideal solution to the problems that plagued the half-baked Best Of, which at one disc couldn't possibly have fit the hits from both the Dave and Sam eras, but Best of Both Worlds turns out to be another botched collection, and one of the reasons it doesn't work as well as it should is that animosity toward David Lee Roth.