1 - How many points do you have?
510 total
2 - Why this number? (how large a family, how many vacations per year,...)
We are an immediate family of 5 - DH-56, Me-43, DS-21, DS-19, DS-(almost)17. That is who typically vacations together. But there is also SS#1-37 and his DW and 14 & 12 yo children and SS#2 and his wife, 12 & 8 yo sons and 11 & 7 yo step-daughters. We started out vacationing (with DVC) ever other year - or about 3 trips in 4 years. As we added on we switched to annually. Then recently we added some parent-only trips along with the annual family trip. So far SS#2 and his original family (before his divorce and re-marriage) vacationed with us once staying in a 2BR at OKW (all 9 of us

) Their youngest was only 6 months old at that time. He has not been back since for a number of reasons (divorce, remarriage, too many kids and not enough money...). SS#1 has never used our DVC. He did go on a trip with DH & the boys (I couldn't go that year due to having just started a new job) but he is Navy and they stayed at Shades of Green. Now that our boys are older we are considering taking some grandkids with us....but haven't totally convinced ourselves that is a good idea yet
Our family trips are typically 7-8 nights in a 2BR unit.
3 - How many times have you added on?
We started with 150 (OKW) in 1997 and within the year added 50 (OKW). We stayed at that point for several years. Then about 3 or 4 years ago (whenever they were offering the extension for OKW) we went to Chicago-area with some friends and visited the Woodfield Mall and Disney's Doorway to Dreams. We walked out of there with 110 (Saratoga) points and our friends became new members. I forget how many they purchased. It wasn't long after that (maybe another year) that we added on an additional 100 (SS) I don't remember why we did that

. It could be because we got 100 developer points when we bought the original 110 that we stayed longer and decided we liked staying longer. Plus since our friends had purchased points we wanted to travel with them, but since they do not have children we didn't want them to feel like they were intruding on our family trips so we wanted to be able to take trips without the kids, but without "cheating" the kids out of their vacations too.
We always stayed at OKW. Then they opened the treehouses and we decided to stay there. On that trip we also discovered the walking path from Studios over to Epcot. That took us through the Boardwalk and Beach Club area. After seeing stormalong Bay our youngest wanted to stay at Beach Club sometime. Last year we called to see about purchasing a small contract at Beach Club. They didn't have any points available in our use year, but did have some for Boardwalk. So we purchased 50 (BW) points. Last Nov DH and I went to BW - he wanted to go to the Children's Miracle Network Golf Tourny. And since I use an
ECV at WDW I liked that from BW I could "walk" to Epcot, Studios and monorail it over to MK without ever having to load on a bus. So this year we stayed at Beach Club for our family vacation and when we got back we purchased an additional 50 (BW) points. That is 6 different contracts, three different resorts, all the same use year.
4 - How many points do you eventually want? All of them

I don't know. I thought we were satisfied with 200 for several years, but it seems like the more we have, the more we want. Even with 460 points, we had borrowed all but 50 of our 2010 points (which aren't "current" until August) When we added on the other 50 we got the 2009 ones, so now we are at 150 (of 510) points for a year that won't technically start for a couple more weeks.
We are also thinking of the future. We have 5 boys

(his 2 and our 3). Do we want to leave our membership intact and have them work out some sort of schedule for using the points, or do we want to give each of them their own contracts that they can then add to on their own. Or do we want to sell them all eventually and let them figure out what they want to do. If we try to give them all their own contracts then we will probably have to add on more because things have to be "fair" and our contracts are different sizes. Not that we will try to make them "even" but maybe another 50 would help them one would get 150, another 110, then 100, right now one could have 2 50's, and that would leave 50 for one. So if we had another 50 they would all get at least 100 apiece. Assuming we can even do that....