im in ketosis and have been stuck at a weight for 2-3 weeks. said fuck it and started drinking coke zero. Lost 2 lbs in the past week.

Chemical cocktail.  No thanks.

Drink Diet Rite.   Seriously, uses Sucralose as the sweetener.

I switched from regular to diet soda some years ago.  At the time I part of my job entailed offering field support to remote service reps.  I found that they would call and ask me about something about a call a few days earlier and I and would have no recollection of the call at all.  Then I read somewhere that aspartame may affect short term memory for some people.   I quit drinking the diet soda and the problem went away.  I have since met a few other people who have had he same problem.  Anecdotal evidence for sure, but real enough for me.  

Then there is that whole myth of the "runner's high".  I never experienced that either and I used to run 5 miles a day.

I wouldn't say everything

Drink water

Bad for you:

I'm not sure there is a correlation between that.

If you hit a plateau try doing a one night carbload.

I just can't stand the flavor of diet drinks.  Aspartame tastes bitter to me and I'll get the occasional headache after drinking it, and the other flavors like Stevia, etc all have a weird off taste.

I just don't drink many soft drinks, maybe once a week, and mostly regular HFCS stuff.  The sugar sweetened ones taste best.  If I feel like a daily sweet drink, I'll drink sweet tea.  We always have a pitcher in the fridge at home.  I won't drink a nasty tasting substitute.