Hey Pipz, you're right about tanks. Something just isn't right unless they're 1/35th. However, having cars, tractors, and so forth, is pretty cool when you can make a mini-diorama. You want to talk small? I did the Academy 1/72nd Kettenrad. And I super-detailed it!!! (well, for me it's "super detailed", but I hear they make a very complex PE set for it).
I like 72nd for aircraft though. A 72nd WW2 fighter is a good size. Still lare enough to see individual instruments, to detail the seats and sidewalls of the cockpit, but not large enough to take up all your $$$ and shelf space. My storage is limited (and always has been, it seems). Plus I like twin engine bombers, and 72nd is the best way to go for larger planes. There are problems with quality and lack of detail in some kits, but the same goes for 48th scale as well.
I had a Roden(t) He111E-1 almost ready for final paint when the new cats trashed the main gear struts something awful. VERY bad kit, but I got it looking pretty smooth. Now if only those cats hadn't ruined 4 hours of work (yes, 4 hours, no placement pins, no angle diagrams, and very complex landing gear struts, one for each wing).