Tequila Sunrise
Adventurer
Maybe I'm the odd man out, but I would actually have difficulty describing a big monster that doesn't have threatening reach if a player specifically asked for a description. I mean, the 3e way of handling reach/AoOs seems quite natural to me -- so the 4e default of a big creature threatening no more than a PC seems very gamey. I think that if pressed, I'd simply say "Ugh, this one doesn't have threatening reach."