1. Which pages do you refer to the most or What are your favorite pages? Why?
I refer people in general to the wiki all the time! A lot of the same questions get asked, that the answers are provided for. Even though, I also should look at the wiki more before asking certain questions! Its easier to type it, than to search for it in general usually. I tend to look at the ointment/pet pages a lot for reference, as i'm working on my imps a lot currently.
2. What are the three most organized or useful pages on the wiki? Why?
The awesome guides are pretty awesome. I think in general most of the pages people have worked on are useful and organized. Some (vet rewards sticks out) are incomplete, and have been for a while, but is that because we don't know the rewards we get? Or, we don't get anything? Perhaps +C could chime in, and we could add that to the finished list. I don't think i can really narrow it down to just 3, as I would say most, are very organized and useful, depending on what you as a player are interested in. I glanced at the awesome guides for example, but didn't read them thoroughly, because i prefer pets. At least for now, I believe my opinion is changing as certain people are showing me what a difference a few things make to my fighting abilities!
3. What are the three most disorganized or confusing pages on the wiki? Why? What are some suggestions to fix them?
To be honest, I haven't read all of them, as I only read the things I have questions about, or I am interested in. The Vendor stones page is great, but it could be expanded to list what the different items DO exactly. A hooded shroud sure sounds cool... Also, on the bod reward pages, perhaps a description of what each of the rewards DOES, or what items you CAN get with bods that give DECO for rewards. That way, if someone is attempting to get a certain kind of deco, they know what to look for.
4. What information is needed on the wiki?
This is information you cannot find anywhere else, be it UOGuide, Stratics, and perhaps even the forums. Many of us see no reason to duplicate information. Some information doesn't have a lengthy enough explanation to warrant an entire page being created for the information; this is where you might use forum searches to look for an answer. Also, not all information will just pop out at you from the main page. There are other ways to search the wiki: using the search box, or using the categories linked from the top of the main wiki page and in my signature on this post. Be thorough to avoid mentioning information already on the wiki, or easily found out through the forums or other UO sites!
Sometimes duplicating information is a good thing. While every little piece doesn't need to be repeated all over the place, anything custom, or different, or stuff that just gets asked about a lot. The main thing i would consider really adding that we don't seem to have (or i just haven't read yet) is some sort of progression for the different difficulty stuff. If i am just starting out, can i do doom? should i even attempt it? How tough are lurgs? Are there places i should avoid? Some sort of list, to challenge people to new and exciting things. Can you do this? Why don't you try this next, its more challenging, and since you did that ok. you might be able to survive over here. Without my pets, i die very very quickly. Thats changing slowly now, as I'm becoming more of a fighter, but I don't know what i should be challenging myself TO. I don't like to take many risks, in life, or in game. If i know I can do something fine. If i MIGHT be able to do it, i MIGHT try it when I'm feeling daring. If I have no business being anywhere near Sgail with less than 500 hit points, thats good to know too.
And of course, any of the custom stuff should be expanded upon, if its not already.
Overall I think the contributors have done a fantastic job on the wiki, and I use it quite often.
And finally,
5. What keeps you coming back to Excelsior?
I can't figure out fair pricing for my goods, and I keep trying to get people to divulge their super sekret formulae! I enjoy kicking back and relaxing, and talking with some of the friends i have made. Its a good shard overall. I enjoy the updates we do get for the most part, and love the custom events the staff (and players) put on! I wish there was more time for coding, or we had a full time coder to get more players suggestions implemented. Some approved stuff from 07 still hasn't gotten put in for example

Many people talk very highly of the shard as well, and my own experiences have proved their words. Also most people are super helpful, which is a good thing.