Used version : v1.1.0.0-g32a928e (win64)

General

A graphic designer would be great right now (not me). The Wallet as a whole looks like it's made up of different pieces.
1 For instance the Transactions an Adress book tabs look like Windows 95 compared to the Dashboard wich is fresh and crispy
2 On almost every tab the name of the tab is in the top middle except on the Send/Recieve tab (i think the buttons are blocking it so they should be a bit lower)
   Also on the Market Data tab it's not on the top but below the Main and Graphs buttons so switch that (not just Overview but also Bittrex, Mintpal and Cryptsy) . More important; it's not the same font as on the other tabs!!
3 Restyle ALL the buttons in the same manner. Now there are square (on Actions and Send/Recieve), semi rounded (Dashboard) and rounded (on Market Data) buttons
4 consequent color scheme. I dont's care if it's ancient silk road themed (desert ocre and yellows combined with bright colors)
http://www.washingtoninst.org/wp-content/uploads/2013/05/desert.jpg
http://travelioo.com/img/Grand-Bazaar-Istanbul-Photo1.jpg

or a more modern color scheme with black/grey and just a few brighter colors to highlight

Dashboard

Main colors (nav bar and background) look ok

Send / Receive

When Recieve is active, i can see a letter behind the send and recieve buttons (look closely i'ts right in the middle of the 2 buttons). Looks like there's old text behind the buttons.

Transactions

OK
but looks OLD

Address book

OK
but looks OLD

Statistics

Market Cap at 0$
OK but could also use some color/contrast

Block explorer

OK but could also use some color/contrast

Market data

shape and place of buttons

Social

OK but a bit dull (colored social media buttons?)

Actions

Colors, shape of buttons

Settings

OK (possibly a more modern window?)

Wallet interface

Reduce (to taskbar / to tray) as mentioned before
Maximize button possible?
May be a small bezel around the interface?

Conclusion

I really like the taskbar/tray icon !!
And since this looks like a camel from outer space i vote for a modern crisp wallet

Just my 2 SC