I can't say if "our" (or mine is more fun for that matter). I haven't lived both NT and Aspie lives. I do know however, that generally speaking, looking at what I do on a day (or just to keep busy) I can't say that it's not fun. Yes, we all have our downs and annoying moments, but NT's have those as well.
And actually looking at a fair share of NT people, for example on my facebook list... their activities, their lives and what they do, doesn't look like a lot of fun to me personally. They have jobs I don't consider fun, they got degrees on courses I don't consider fun and they might even have hobbies I don't even consider fun. And that's coming from someone who tried a lot in terms of hobbies and education. By the time now I kinda know what's fun and what's not for me.
On a related note; a lot of stuff I deem fun, people, assumably NT people, won't really think is interesting either. If I tell someone I had a blast reading 500 pages of neuropsychology on a saturday night, a lot of people will frown and ask me "don't you have a social life?"... well, no... I don't have a big interest in that, and as such starts the discussion of fun and perspective (yes, again, that ugly word... perspective).
If we're talking fun, I think that it's rather important to make the best out of it and not let it depend on a lot of external factors; especially it's factors that in short supply (money, friends/other people)... then you might consider evaluating how to fill in that "fun" slot. It's how I learned to cope with doing stuff just on my own, and at some moments with little to no money. A big thing there however is that you don't set a goal in mind except "I want to do something fun"... if you're starting with big goals in mind, you can kinda guess that at some point you'll have to invest in it. I mean I could say that I want to go shopping as means of fun (and maybe even plan what I want to buy). But if I don't have a lot of cash to blow, I'll find a lot of disappointment.