به نظر می‌رسد خوب باشد.

Yes, but it usually refers to their appearance or a specific trait, e.g., 'He seems kind.'

'Mi-resad' is formal/written; 'mi-yâd' is informal/spoken.

In formal Persian, yes. In very casual speech, people sometimes use 'ast', but it's better to stick to 'bashad' or its short form 'bashe'.

Yes, that means 'In my view, it's good.' It's a very common alternative.

Add 'na' to the verb: 'به نظر نمی‌رسد خوب باشد' (It doesn't seem to be good).

Yes: 'به نظر می‌رسید خوب باشد' (It seemed to be good).

No, it just implies you are basing your opinion on appearance or limited info.

Constantly. It's the standard way to evaluate proposals and ideas.

Then just say 'Khub ast' (It is good).

Yes, if you are looking at the food but haven't tasted it yet.

Yes, 'nazar' is the most common word for opinion in Persian.

به نظر می‌رسد مثل یک رویا باشد.