Inflation is better if:

you have outstanding loans or other significant debts – they will be impaired.
You need a loan - if public loans are available for banks, they will also be more accessible, interest rates on such loans will fall in relation to the increase in prices.
Deflation is better if:

You do not have debts on loans or other unpaid loans – if deflated, the salary will also decrease, but the payments to the Bank will remain at the same level.
you have savings in the national currency – their real value is growing.