I'll explain my case more specifically so you could give a full opinion:
This is a death metal band (small grindcore influence, mainly traditional kind of Dm) that are friends of mine and I will record and mix their two song demo to put up their myspace before they gather the money to record in a professional studio. Now these guys I know they aim at a traditional kind of death metal sound (double-trackied guitars i.e.), but I plan on doing two separate rough mixes and give them to chose on their taste the sound of the instruments: one traditional Dm type of sound with double tracked guitars, clean trebly bass, normal not so trebly kick drum, etc. and one grind-like mix with quad guitars, distorted bass, noisy kick drum etc. I want to do this because I'm still noob in this and want to test both kind of mixes and see how that goes out.
Now the band has only one guitarist, so I plan on making him double track all rhythm guitar tracks, but for the rough grindcore mix I could use four guitars. but I think it would be too much work for the guitarist to quad track if Im 90% sure they will want it double-tracked anyway (he's not that much a super tight player, quad-tracking every guitar part would be a nightmare to him and would take forever to get it totally right)
I'm still nuts, right?