1) I think there are ~75 skills per class, and you get to choose a primary and secondary class giving you ~150 skills.
2) Don't feel like it summarizing
3) lovin' it.
4) awesome graphics
5) very little grinding, game isn't broken into different servers. There are districts, but it only takes ~2 seconds to change district.
6) Whatever fits your playing style. The game is so well balanced that there are no cookie-cutters.
7) I'll let someone else compare them
8) The Beta Weekend Events are one weekend once a month. There are two left. The March beta which starts tomorrow, and then an April Beta which starts April 15th...I think.
9) You can chose a primary and secondary class. So 2 classes.
10) From what I've seen there isn't an auction house yet. But the developers are working on the trade system I believe.
11) Not sure what you mean.
12) As of the beta, it costs gold to start one and even more gold to create a cape. When the guild is created, you are automatically given a Guild Hall which appears on your map in which you can teleport to.
13) Seems large to me
14) The mode of transportation is Insta-Travel. You click on a town that you have visited and you will teleport there. You don't have to sit around for a couple minutes watching your self run or sit on an animal's back.