This question is sparked by brief conversation I had with @sdirrane, wherein I thought that he didn't like user created solo variants.
There are many many good games that come out every year. And, while many of them have solo variants, a good number of them don't. And, it is clearly true that it can be very difficult to create a good and engaging solo variant. However, it is not at all unusual that sometime after a game is released, those who play and love the game will craft a solo mode for it. If you go into bgg you can find scores of solo variants for any number of games that don't have an official variant.
These variants vary widely in quality and difficulty to implement. Some only use the components which come in the game, others ask you to pnp cards, round up dice, find some extra cubes, and etc. Sometimes these variants really change up how the game feels, and sometimes they are remarkably true to the original intent of the game. Sometimes these user created solo variants actually get picked up by the publishers in one form or other, to go with their game. Some notable examples I can think of this is the better bot project for #Root and being sold as #Root: The Clockwork Expansion. Ricky Royal's solo variant for #Pax Porfiriana has been included in later copies, etc. All this being said, the vast majority of these variants will never see official publication.
The advantages of something like this are readily apparent. You can play games solo, where previously you couldn't. Your library as a solo gamer has a lot more options.
But there are some disadvantages as well. There can be a lot of variants for some of the more popular games, and it can take some work to find out which one(s) you like. And, after you have tried all of them, you may discover you like non of them. Furthermore there is the crafting aspect of some of the variants, in which you must needs do a certain amount of pnp or that sort of thing. And, lastly, unfortunately, while it is true that many of the people creating variants are great designers, however, many, when considered as designers, are barely more capable than me. When you run into a design from the latter, it is frequently difficult to run and unsatisfying to play.
I am like the idea of user created variants. And, I have gotten games, such as #Root, specifically to play solo with the user created variants. However. I do recognize that it can, at times, be difficult to find one which is satisfying. I guess you could sum up my position by saying that I will consider a game a lot more if there is a well regarded, user created solo variant. But, I am generally unlikely to buy a game only because it has a user created solo variant.
So, what is your position in regards to user created solo variants?