One or more.

I'm not quite sure the make and model would have much to do with it, although I'm not saying it has nothing to do with it.  I think it would be your situation, your knowledge and desires.

When I bought my first "half decent" guitar, an upper-end-entry-level to bottom-end-mid-tier guitar ( it was a Takamine at about 600 bucks about 15 or 16 years ago), that was my only guitar for around 3 to 5 years.  Before that, I had a very basic entry level Yamaha for around 15 years as my only guitar.  I was very happy with both of them being my only guitar for a very long time.

Until..........my situation and knowledge changed.  Once I started playing on stage and started trying out so many different brands of guitars and realizing all the differences in sound and playability, then and only then did my desire start to change from only wanting one guitar to wanting more than one to serve different purposes and fulfill different desires.

That's something that I don't think you can "undo" either.  Even if I were to stop playing on stage altogether for whatever reason, I'd still want probably...hmm, at least 2 acoustics and a bass.

Having said all that, it's still an interesting question and I'd love to hear some answers too.  There's a lot to be said about being happy with just one guitar.  That's a great place to be imho.

ladyssolo, When I posted this thread, I was thinking of Willie Nelson with Trigger. Some of the guitars I have had in the past have gone before the first string change.

Personally I just like good guitars. It helps to motivate me to practice as well as play out. As for the preference of 5-6 medium level guitars, I would flip for a great one. One that plays and sounds the way I want it too. After all, many flip their cars or homes to upgrade, why not guitars too?

Derick , my Norman was my first and only acoustic guitar for about 37 years. I was only 10 or 11 when my parents bought it for me so I had no idea (nor did I care) what else was out there other than seeing what other kids in my music lesson classes had. In high school and later teen years I was more interested in electric guitar and rock/metal music but there again I bought one electric guitar and it served me for my entire, albeit short-termed, band experience. About 10 years ago I gave it to my nephew for his band experience (or sold it so cheap it felt like giving it away because my brother-in-law said he had to pay something for it for a sense of ownership).

I played my Norman to the point of it needing to get the first three frets replaced and divots in the fingerboard. I thought of buying a new guitar at that time (mid-90's, Takamine model $700-$800) but thought "why put out that money when the Norman is fine?" So I got it fixed, but the repair job was not done properly as the new frets weren't dressed down to even be close to the older ones. Kids came, time was short and playing guitar was put on the back burner.

Fast forward to 2012 and getting back into music, pulling out the Norman and re-callousing my fingers on those frets and a new guitar was "required". More discretionary funds were now available and this thing called "the internet" was available to do research on guitars and I found forums with tons of information about woods and tone and people feeding my desires to start buying "better" guitars and more guitars and.....

That's not me.

I had one acoustic guitar for 37 years and still have it. I bought my Maritime in late December 2012 and Taylor 12 string in May of 2014. I'm happy to have them for what I need/use them for. Do I still look? Of course. Do I want a better/nicer guitar? I think I do. Do I need a better/nicer guitar? Nope. But I still go and look, and pick them up, and play them, and dream.

Derick, you mainly play for yourself and your wife, right? You have five or six guitars now because of the different body shapes, woods and the tones they produce (I presume). You seem to like the variety and abilty to keep a guitar or sell/trade guitars that for some reason an aspect of them no longer appeals to you. Would you be happy with just one "nice" (more expensive) guitar to pick up? Or would you feel you suddenly had to play it because you paid so much more for it? Or are you thinking of keeping your current stable of workhorses and adding a thoroughbred? Only you can answer those questions.

If you have a really good relationship with your preferred shop, maybe you can tell them your desire/quandary/situation and if they have a fairly reasonable return policy you could buy The One ^(TM) guitar and take it home for a trial run to see if you would like it. Put your other guitars away for that time period and just use The One ^(TM). If you have no desire to grab one of your other guitars I think you have your answer. But if you find yourself thinking about how one of your other guitars would sound or play a song your playing, I think,  maybe, that The One ^(TM) might not be for you, at least at this time.

Sorry for preaching to you (possibly again) on Sunday! I'm sure El Gull , can provide better and more thorough psychoanalysis since that is his field of expertise.

Lol! Martin, you and I replied at the same time!

When I had one acoustic (S6 Cedar), it was The One (TM).
When i bought my second acoustic (Amber Trails MJ), because the 1st was showing it's age; the 2ed Guitar became The One (TM)
I now have 7 acoustic guitars. 
Yet the Amber Trails is still The One (TM).