List the features a DS bike should have

I have read endless banter which bike/ brand is the best but what really counts is the make up of the bike.

What are the must haves and aftermarket product you have to buy to get a good DS bike.

For example seat height, brakes, ease of maintance, type of motor and HP required. Weight is an issue, fuel comsumption so fuel size of fuel tank.

Think out of the box and make a list. Please add dislikes.