It's pretty much a given to have Titanium if are a flashaholic, otherwise it's just pointless. Not doing full wipes are well known to cause issues and then you inevitably have to redo everything and do a full wipe anyway. So you're just wasting time.
Yes, I know, not an issue for me, just saying that's possibly a reason for ppl not doin full wipes (restoring and setting up again, even with titanium can be a little annoying sometimes though)