For me the best has to be the 309gti, or if we can have models that didn't make it to Britain then the Mi16 version. So much more fun than the 205 as it's a lot easier to push it closer to the limit. If people insist on a 205 then it needs to be a 1.9 with the 1.6 box as it transforms it, as standard the 1.6 is a better drive.
As a very leftfield choice I used to enjoy borrowing my dad's Renault 5 GTX and I did used to want a Nova GSi.
Modern stuff is much quicker,safer and duller but if I was after a hot hatch today it'd be a Mk5 Golf gti.