Is it possible to do multi-line editing like Sublime Text but in Vim? I use both, and this was the feature that got me out of Terminal, but besides this I can't think of anything else offhand for what ST2 can do that Vim can't do.
Yes, Ctrl-v to enter visual-block mode, then move up or down to cover all lines where you want to make changes, then I{string}Esc to append a string at the cursor location on all lines. See: http://vimdoc.sourceforge.net/htmldoc/visual.html#blockwise-...
ST2 allows multiple cursors in arbitrary locations - I'm not aware of another editor that supports that.