Lol that's dedication. Maybe I'll give the 2-box a go then. I can be like Barf from Spaceballs--my own best friend!
Once you start boxing ... - You will NEVER go back to playing just a single toon ...
Everything aside ... Boxing is FUN and it also helps alot (atleast it did for me) in keeping the game interesting, because of your options. Later having a box will also benefit whichever guild you end up in (atleast that is my own personal experience) ...
The only "downside" to boxing is gear (when you come towards "The End Game Content"), but that is an entirely other discussion ... >.<
It sorta depends on the guild's stance on alt / box loot... My boxes are fairly well geared through VT loot but DC allows boxes to earn points as well as mains because we rely so heavily on them. This would be especially so for healers as many of us end up boxing a cleric out of necessity. I can only think of one person who's main is actually a Cleric (Miuma). Funny thing is my cleric has more AHR loot (1) versus my main (0).
I do agree once I started boxing I almost never went back as a BL + Clr duo pretty much sets me up for 95% of all grouping for AA's between V's, slows, hastes, sows, tankiness (7.2k hp buffed now!), pulling and a good bit of dps. I just add whoever and let the xp roll. Shoot, I even rock a solid 50ish DS on my BL between cleric reverse DS and my clickies. Adding in the druid to my trio will bump that DS even higher (where does the DS cap btw?)