My sub-tenant is moving out tomorrow and I am in no hurry to find a replacement.
Out of the last 11 or so years I have shared housing in some sort of arrangement or another for eight of them. I coped better when I was younger, I think. Part of it is that I think (AS A GENERAL OBSERVATION ONLY!!!) the proportion of people who share house that are well-balanced individuals reduces with increasing age... you're much more likely to find someone that is a good housemate when they (and likely you) are in your early twenties than say, in your mid thirties. I think that could be because I'm getting pickier as time goes on, but well... I'm not sure this is a bad thing! I would describe myself as an introvert with strong extrovertive tendencies, and as I grew up in exceptionally close quarters personal space is not a big issue for me.
This is in the last four years:
This housemate (subtenant to me): 31? major communication issues although he means well, poor hygeine.
Last housemate (I was subtenant): 32 cycle of major binge drinking and smoking after quitting all/either (we're talking two packs of cigarettes and at least a six pack per night, plus other things), took more than three months to get 'bond' back because it was spent by them
Penultimate housemates (I was subtenant): principal tenant was about 22 and had no life experience, and the other two housemates had even less. Made bills, cleaning, conflict resolution, etc.
Not saying I won't share again, but I will probably want to be principal tenant and take a subtenant, rather than equally share-house, and I would prefer to be exceptionally picky about who I live with and/or take people in for a limited time with a firm end-point. Regardless I of whether I share house again or not, my savings rate will be about 50% and as I don't intend to retire early, I am willing to delay FI for a few years for better quality of life in the meanwhiles.
My experience, YMMV