Queensland: Light gaiters, quick dry shorts (e.g. nike), heatgear long sleeve skin tight top (not a good look but coolest design to wear).
Tassie: Heavy knee high gaiters, quick dry shorts (e.g. nike), polypro or micro fleece top.
If really cold I may have a skin tight short sleeve XGO shirt under the thermal and if really windy or wet a shell top and silnylon rainskirt. Never walked in anything heavier than even when snowing. But I get the insulation layers on the moment I stop

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I have walked in flannelettes - IMO an 8$ anaconda thermal top is that much better under a pack. I even used to wear cotton chesty bond shirts under the flannels - survived but can do better.