The "Soda Dark" theme goes well with the default color scheme. (The ui theme is separate from the syntax highlighting color scheme, you don't have to use the text colors seen on the github examples)
https://github.com/buymeasoda/soda-theme/
In terms of plugins, apart from the ones mentioned here, Quick File Creator is indispensable: https://github.com/noklesta/SublimeQuickFileCreator
Not a plugin, but if you haven't realised it yet, know that the multiple cursors each come with their own separate clipboard. Learning how to combine this with the move and select by word and the parenthesis-movement commands is what will make the vim users eventually respect you.
Oh and you can hack your language syntax definition files to make more things apart from function definitions turn up in the function browser. This is especially useful for ruby DSLs, sinatra etc.