I've been using FLStudio for over 5 years now and it is incredible what you can do with it. The best thing I found about FL was the sidebar and all the tutorials I found there to help you out.
Love the piano roll, the playlist and all the cool channels you get with it.
The FPC and FL keys are awesome, soundfont player is easy to use, step sequencer is useless IMHO, channel grouping is REALLY usefull, event editor is simple, export to zip is a gem.
I just like the user interface and it does everything that I want it to do.