I tend to use all 3 depending on when... can't beat the easy of Synaptic for just putzing around, definitely Aptitude when building up from scratch with a netinst or APT for single packages, quick updates\grades and so on.
dpkg -i myWiFiDivers.etc.deb
+1 for to each and there own but you got to try them all. I'd say APT for us "
s" to learn more.
Best wishes and have fun!