Location is important to me but I tend to find myself just going to see the lady who I want to see.
D18 would be my preferred location as it easy for me to get to. There is plenty of free parking. It is easy to find my way around and most of the apartments are really nice. Plus, I never feel " out of place " there.
I am not so keen on the city centre as it usually takes longer to get to and there is the problem of parking. Having said that there are some ladies who are worth the extra effort to go and see so I will venture into D2 and D1 IFSC — I wouldn't be keen in D1 north. D4 would also be OK but nowhere near as punter friendly as D18.