Disclaimer: Nick, you were right - it's hard to choose only five (and I was just winding you up, sorry).
WiiU - Finally, a console my children love as much as I do. If the wii succeeded in involving the whole family, this one knocks it out of the park! And playing my games in bed? Golden.
And the best is (probably) still to come!
SNES - Probably the console I've spent the most time with, mastering a wide variety of titles from Mortal Kombat, (1,2 & 3!) to Super Mario Kart and Super Bomber Man. And it JUST KEPT GIVING, releasing games that had no right to run on such old hardware, like Star Fox, Street Fighter Alpha 2 and the Donkey Kong series.
GC - REMake, RE0 and then RE4 and the rest of the series ON ONE CONSOLE? GTFO!
N64 - I can still remember the wow factor of seeing Mario64 for the first time, and then AGAIN actually playing it! So many gems that simply weren't possible on disc-based systems... and
no loading times! Also, the analogue pad! Rumble! 4-player split screen!
DC OR 360 - RE:Code Veronica is probably my most anticipated game of all time and it didn't disappoint, either. Also, the Capcom fighters, first console with a browser (anyone still use Exc!te?), so many arcade-perfect conversions (at a time when that still meant something)... but still, the graphics didn't wow in the same way that they did with N64, and I felt that some of the SEGA franchises didn't translate so well into 3D, such as Sonic or Echo. SO...
...I'll go with
360. The Halo series (Legendary only, of course) is enough on its own, really, but also worth mentioning the introduction to HD...