I don't like it AT ALL!
I hate having the email on one side only -I want it full page with nothing else on the screed- , I hate all those colours by the contacts -tiring, overload of info, distracting, most users won't be at pre-school age so we can do with black and blue alone!- I hate the location of the send/forward..., For a minute I was hopeful you had decided to go back to the previous version, please restore that one!
First off, thank you for taking time out of your day to try the new Outlook.com experience as well as providing feedback!
Since you have left this feedback, we have introduced a lot of additional settings that will allow you to configure the experience to be closer to the classic Hotmail/Outlook.com experience.
Specifically you might be interested in disabling the Sender Photos (the color circles next to names) and the Reading Pane.
To get started click on the Gear in the top right.
From there you might want to Disable Conversation View, Reading Pane, Sender Photos, Attachment Previews, Group messages by date, and Focused Inbox.
Once you have those off it should look much more like the older experience.
Hope this helps, and please keep the feedback coming!