You could have asked about Gary Cherone-era Van Halen (or pretty much [any]-era [any band]), and I'd still not have voted for GnR.
What's so wrong with GnR?
Aside from the vocals and the music, they're ok.
Seriously...the first time I heard GnR was Mr. Brownstone on the radio. I legit thought it was a joke. Unfortunately, it wasn't (or at least it wasn't intended to be). Axl's voice was utterly stupid, and the music was nothing special. Other songs started to make their way into heavy radio play. Axl didn't use the same stupid vocal technique as he had on Mr. B, but his normal "singing" voice was hardly any better -- like listening to a bunch of cats in a room full of rocking chairs. And again, the music wasn't anything special. Tons of other band could put the same stuff out in their sleep.
Aside from all that, I could never figure out why they were becoming so popular, so I disliked them even more. Then there's the band's image, which I never liked.
I could go on, but I'm sure you get the point.
Okay, I'm genuinely curious why people voted Van Halen. I'm not trying to be rude and it's fine if you like them but they are just so freaking corny to me!
Some of their stuff is corny, but corny is better that screeching cat vocals. Plus, Eddie's a great guitarist. I'm not a huge VH fan, but as I mentioned previously, I would vote for just about any-era of any band over GnR, so my vote for VH is less of a vote for the greatness of VH than it is a vote against GnR.