I use to run on and off and than I really got serious and enjoyed running in 5k's with my dad, after my dad passed away I felt like I need to run a marathon maybe for him but I did it and felt such a sense of accomplishment. My favorite distance is the half marathon, simply because it take less training and I am able to spend time with my family and less time trainning.
I am running Gettysburg Marathon 04/2012
Capital 10 miler
and a few more but haven't decided which ones yet.