OK here goes...

1) For sheer quality of construction : Post-war Slant grip Webley Senior
2) For technical perfection : Morini 162ei or Steyr LP10
3) For an heirloom you can pass on to your kids : Webley Tempest in any calibre
4) Usable vintage : Crosman Mk.1
5) Nearest thing to a real firearm : Gen 1 Makarov
6) Budget Target gun : Tau 7
7) Budget plinker : Crosman 1377
8) CO2 replica : S&W 656 in original shiny blue finish or Pellet version of Webley Mk.VI
9) BB : Remington 1911/Tanfoglio Witness or one of the many derivatives
10) Multishot : Crosman 600