2000' seems to be the norm in the UK for most VFR fixed wing pilots.
Mainly because the cloudbase tends to be around this level and rarely is it possible to go anywhere at a higher level without penetrating cloud on this cloudy windswept little isle of ours.
1500' seems to be the rule for helicopters - my instructor told me that helo pilots get nosebleeds above 1500' so best to stay low!
If I am VFR fixed wing I go higher for tailwinds (as high as I legally can)and lower into headwinds but keep at least 1500' agl (if I can).
If I am IFR outside of CAS then I like at least 2000' AGL.
If I am IFR in airways then I file for FL090-130 depending on winds.
If I am VFR in the helo it is up to 2000' AGL.
Round number VFR altitudes (like tracking directly over VORs) are best avoided in order to minimise the chances of "sudden aluminium".
SB