Didn’t mark both nude as it isn’t a requirement but is preferred.  Like someone experienced, but will consider the individual and what they are seeking.

Gender,,, it must be a girl massaging me…. I’ve received so few massages, yes a much prefer to give, if I am receiving, I’d only want a female.

GENDER - Not a big issue, nor is race or sexuality.   Don't really care about these things; I'm not looking to pick out curtains with you.  

BOTH NUDE - I wouldn't turn down a massage merely because of nudity or the lack of it.
EXPERIENCE LEVEL -  Training  is good, but I've had  awesome exchanges with novices also.  The only way to gain experiencxe is to engage with others and give it a go.
EQUIPMENT AVAILABLE -  I have a table and am happy to bring it if necessary.  Beds are great for sleeping and horizontal dancing, but not for massage.
PHOTO AVAILABLE -  Video chat works too.
THERAPUTIC ONLY! - Great!  Let's do it.
LEVEL OF SENSUALITY - Great!  Be prepared to communicate what you want as well as what you don't. Communication is key for a good experience.

Distance and hosting ability also factor into the equation.

I didn't check nude as I am comfortable with both being nude or just the reciever.  I always like to see who I'm talking to when setting up an exchange. And like to know if they have a table or not. I also like to know level of experience as some people are intimidated by my years of experience. This way I can aleaveate them before the exchange.

Oh so interesting and we think that everyones's answers say a lot about them. Here are our thoughts:
GENDER - Well of course everyone pays attention to this, kinda natural, but we massage both genders equally. If you are doing serious massage you should do both. It is also fun to do both. In massage school you are trained on both genders and we believe in gender equality. On the other hand, if you are seeking sensual massage or have hangups about gender you go for what turns you on or off and that is ok.
BOTH NUDE - We are nudists and live in a nudist park. We live nude 24/7 and are not about to get dressed to give a massage!
EXPERIENCE LEVEL - We have taught and guided many newbies and enjoyed great massage with them but the more experienced the better the odds of getting a good massage in return.
EQUIPMENT AVAILABLE - If you are not working on a table you are not serious about massage period! The floor is the second best option if you are young enough but we gave that option up years ago. A bed is a wonderful place for sex but let's not call that massage. You need a firm surface to use pressure. As rookies we got a cheap church table and put foam padding on it, but that was only a substitute till we could afford a good table.
PHOTO AVAILABLE - Massage should be all about body acceptance. We have personal preferences but massage is about health not beauty. We like to see what the person looks like but if you are working as a therapist you generally don't get to choose. Everyone deserves to give and receive massage. Love all, don't discriminate.
LEVEL OF SENSUALITY - This one is a real choice, some people just don't want to be touched in some areas or want a more impersonal experience. We take a holistic approach and believe that the human body is sacred and all parts deserve equal attention. For those who enjoy sensual or erotic you just like some parts touched more than others. In North America we generally have lots of hangups about touching and being touched and

I think a massage is far more comfortable received in the nude and far easier to give to a naked person the full muscle and skin tissue are accessible and strokes can flow from adjacent parts of the body. As a massage should not be a hurried pleasure the location needs to be comfortably warm so it makes sense for the giver to be nude too or wear light clothing.
I prefer using a massage table to avoid back strain, ideally with an adjustable height facility, good warm lighting, warm oils and some gentle music to relax are needed too.

I think what I’m ultimately chasing is good quality, a connection, and satisfaction.  I think if those aspirations are desired by both parties and mutually reciprocated on either a short-term or long term basis it will be like hitting the jack pot.  I’ve done massage before, both received and given, but the expectation for me is enjoying it on more than a one and done basis....but everyone’s situation is different.  I totally get it.

I selected equipment because I like to  use a massage table when giving massages.  It's just easier on my back and it allows me to give a better massage to my exchange  partner.

I selected both nude because that was the closest answer.  I prefer to be nude for a non-sexual therapeutic massage because I'm most comfortable in my skin. The level of dress for my exchange partner is up to them. 

Obviously not everyone is comfortable massaging a nude male, so I am able to work in their comfort level.

Communication is key. I know I don't speak up enough, but I have learned that communication of expectations in advance & during is key to any relationship. Including massage exchanges.

It doesn't need to be racy or anything, but I like to be able to picture who I am speaking with and might eventually meet.

I prefer to talk/text about all of this before we actually meet for the massage exchange. It is no fun guessing what is okay or offending someone.