Do you guys keep the slip covers on or take them off?

[Valkyr47]

Out of the 9 blu-rays i now own, 4 of them came with slipcovers

with ratatouille, dr. no and POTC curse of the black pearl, i took the slipcovers off because the case artwork underneath is exactly the same, and i prefer all the movies look uniform on my shelf

however today i purchased transformers and found that the case actually looks kinda bland without the slipcover because its just the two heads of the transformers, the title logo and all the movie info is on the outer slipcover

so now i have to decide to just accept transformers without the cover or pull out the other 4 and put those back on the movies

what do you guys do?

thanks!