lol @ the people on this thread selling Coeurl as a bird and pony farm server... Please spare me some of your luck if you haven't come across the infamous "Coeurl farm," in which everyone in the party confirms they have the fight on farm... and then 80% of them die to the first mechanic--repeat until enough time has passed to vote abandon. Every time I see a "Ravana birb farm" in the PF, my first thought is "How willing am I to wipe due to others today?"
Coeurl, to me at least, seems divided pretty strongly between the raiders and everyone else: if you have a decent static on Coeurl, you can raid here as well and happily as on any server, but for new people coming here, getting into a good, dedicated group is extremely difficult. Casual players can definitely enjoy Coeurl (there's a strong "we'll get there eventually" mentality), but this server is very hard on middle-of-the-road players, which is where I'd put myself and most of my FC: good enough to progress, but not driven enough to become hardcore raiders; there aren't many options for this group on Coeurl. Trying to PF PUG one or two people to flesh out a raid party is almost always disastrous or your party may take hours to fill, and the population of the server is very low, so forming new groups and convincing really good new players to stick around is nightmarish.
Coeurl's economy is hideous as well, mostly due to the fact that the population is so low, the number of master crafters we have is equally low and supply can't keep up with demand. I hope you like sinking 5+ million into one phase of your new relic... I also suspect there are a crap ton of people on this server buying gil (judging by the literally relentless RMTs), causing further inflation.
Of course, because the population is low, there is some housing available. Mansions are hard to come by (only one available currently, at 55-ish mil, and it will be gone before it hits 45 mil) but there are some medium and small houses still available, at least one in each area, I would say. I would not suggest moving to Coeurl just for housing though. Not worth.
People are generally nice here, but not really nicer than any other given server? I think if you put in the effort, you can probably make good friends with like-minded people on any server you go to.
My summary of Coeurl is basically: "Well, I'm sure there's a worse server... somewhere..." Like someone else said, the primary thought process often boils down to "I should go somewhere else... but I like my FC too much."
You can have a positive experience on Coeurl (I do, most days)--but you could likely have a better experience elsewhere.