Found WikiTree about 1-2 years ago but wasn't ready to sign the Honor Code because I was just starting genealogy (mostly on Ancestry.com). Visited a couple of times off and on during that time period but still hesitated about joining.
In February, this year, I finally decided to join. I felt I understood the difference between just adding people to my tree and adding ancestors. I wanted a place to bring all my information together so I didn't have to go back and forth between other websites.
That was the background for my answer. I joined and like most people I wanted to upload a gedcom. I read the instructions carefully and resisted the urge to upload the 4,000+ tree from Ancestry.com. I then re-read the instruction page, especially the size suggestions, and whittled my tree from 225 to 70 people. While waiting for the gedcom approval, I started following the various links on the drop down menus at the top of my navigation page.
First, I learned that gedcom is not the best way to go when you join WikiTree. So it prepared my mind that there was going to be work to clear up the source import being lacking in an usable format.
Second, during my week wait for approval, it answered a lot of questions I didn't know I had. I added several posts to favorites that I used for tips and ideas. Plus 1001 little things - is the profile open or not; private message vs comment on profile; badges; profile protection, etc....
Third, it gave me a sense of a real community. I'm a bit introverted but I don't feel hesitant in posting in G2G. Everyone gets that when you post you just want to find an answer or an alternative (outside the box) to get past the knothole in your tree.