Don’t really have a fav three bands
if i can hear it, will work it on any band i cover from 80m to 6m in SSB modes
But most worked for me has to be 40m and 20m followed by 15m and 10m.
40m can be a good one when longer distance is running. Take other afternoon caught sotas in SP and OK at 1400KM and 2 hrs laters getting more localised in ON and DM with the hint of GM. Again I suppose am lucky being in my location as 40m serves me well from small distances too above 1700km.
20m again depends on time of year Es etcs one can get during summer months shorter hops from GM GW and GI and On and PA and some F have been recently added to the scores on the doors at 20m. BUT have noticed at times if am not getting less than 1000km on 20m any thing around 1700 to 2500km from RO and SV comes in but more so in winter and shorter stuff in summer months.but RO and SV does appear nicely at times on 15m during summer months
But end of day It is pot luck on how conditions are running in your favour or not
Golden rule for me keep eye on the watch if reported no matter how stupid it may look. Pop to the freq and see if the signal is riding in or not and have been surprised what i can hear and work at times.