Plenty of stuff like If You Want Blood the live album. Went years without listening to it a 4th or 5th time, was not a big live album fanatic until recently.
The Led Zeppelin album that got me hooked the second time was probably Houses of the Holy, an album I never really thought much of the first time but the second time I understood more of it and realised for an experimental album its actually pretty damn good.
Mastodon Remission - Listened to it twice and couldn't get into it, left it on the shelf for several months before giving it another listen, whatever I was not hearing that I could get into the first time I do now, love that album as well.
Judas Priest Nostradamus the famous concept album they did was definitely something that took me some getting used to. Went months if not a year without giving it another shot, now I still say its not the best work but its decent.