I am frankly the opposite, I want there to be a large mess after I'm done, I intend to use a firearm for many reasons but my main one is that I want there to be a pool of blood beneath my head. I can't tell you why I am drawn so much to this in particular, but whenever I see an image of a dead body. I have always been drawn in a weird way towards the firearm deaths, and specifically the way that the blood pools. maybe it's the consistency of the blood, or I simply like the colour but I really want my dead body to have a pool of blood around my head.
For basic hygiene, I obviously will shower and clean myself before, but other than that and some fresh cloths, I don't really care much for my appearance in terms of how presentable I am, I have always had long unkempt messy frizzy hair (I am Male) so I never really cared for how other viewed me, and that wont change for my death and afterwards.