location (obvs)
view
quiet
shower -- good water pressure
magnifying mirror and good lighting in bathroom

Clean
Location
Balcony I don’t necessarily need a view but outside time I’d important.
Distance from airport

Clean. Good pillows. Flattering lighting in the bathroom. Coffee maker.

I need a tub.

Clean, clean, clean
In room safe is nice
Free self parking if I have my car
Safe area, good location
Store to buy snacks/food
Free coffee in AM

We're usually traveling with elementary age kids, so our number one must have is a suite or similar. A refrigerator/kitchen is nice, a pool is great. Location is negotiable as long as it's in the general area, view is irrelevant.

Clean, safe, working AC/heat.
Breakfast included is nice to have.

coffee
walkable location
doesn't smell weird

everything else i can deal with

Clean
Location
Free Breakfast - not a deal breaker

Depending on trip:
Airport shuttle

Beyond the obvious cleanliness and comfort, location is the thing that matters most to me. After that, I usually want a balcony or patio. (Especially if traveling with DS). Then I'll care about view.

For the most part, we don't spend much time in the hotel so location tends to the the biggest deal. And we aren't picky.

New -- it will more likely be cleaner
I don't want to see the bathroom door from my bed
Blackout curtains
Can open window
Can contol temp
Quiet, both from outside and other guests
Location
View

Clean
Safe area
Hooks/hangers and a place to put my bag that isn't directly on the floor

Pretty much anything else, I can live with.

*obviously a comfy bed with clean and soft linen

Location
View from the window
Nice shower & full size toiletries
Microwave

I have to book some hotel rooms for different locations next month (mainly for leisure) and I am overwhelmed by the choices, plus I am picky.

The most important elements to me in a hotel/room in order are:

1) View - a bad view can ruin it for me if I am there for more than 1 night and I pick my room based on the view every time. This is the most important by far.
2) Walkable location to good/interesting places and restaurants if in a city, especially if no good hotel restaurant.
3) (Tied) No cold or modern interior and no rainfall shower (hate).

I read the reviews on Google and Trip Advisor before booking anything and look at the photos by customers. I see most people with bad review complain about service the most which I don't really care about much or they complain about cleanliness, which I guess I do care about if it is a recurring theme in the reviews.

Are these similar to what you look for?