Laminate instead of carpets would be a plus point for me, in fact I try to avoid carpeted unless brand newly laid. Everyone has different preferences but mostly hard floors unless very cheap and poorly fitted are seen as a plus.
A room with a walk in shower and no bath….that is very tenant dependent becuase some people really want a bath or have children who they’d prefer to use the bath. But for many a good walk in shower is preferable to a cramped shower over bath situation. So I would say if it is of decent size and quality it narrows the appeal slightly but is overall neutral. If it’s cramped or poor quality then it has no advantage and will be an overall negative.
Small kitchen, depends how small and again depends on the type of tenant likely to be looking in your area. Small is usually not a dealbreaker, unusably small as in no room for a fridge, barely any counter, cupboards too shallow fo take a plate…that will put many off and will reduce price.
Bathroom and kitchen…depends how bad they are, if it’s just dated decor it will reduce price a bit, if it’s really grotty I’d avoid. If the landlord doesn’t want to pay for repairs that are really needed that’s a huge red flag.
Parking is an advantage for sure, whether two cars rather than one helps depends on tenant requirements,
Pets…to me irrelevant but will definitely be a plus for pet owners, although with the renters rights act now in force landlords must consider all requests re pets fairly, I am not sure how that will play out in practice. For some, if the property has often had pets and that has worsened condition it will be a negative.