I've not really played enough space sims to have a good perspective of how they should be, my experience with space sims is the Starfox series (although from the definition given that may or may not count) the original Descent Freespace and a more recent game for the 360 called Project Sypheed. From the fact that I had heard absolutely nothing about it before seeing it at Blockbuster and renting it, and that it's only about $12-14(USD) used, I would guess Project Sylpheed isn't very popular. It makes sense I suppose, the story is horrible and best ignored and it has a tendency to get repetitive, but I still rather like it. It's freedom of movement is mainly only hurt by the fact that the HUD makes it extremely difficult to discern just how close you are to some objects, the only indicator besides a small meter that tells you your approximate distance from a single target being your own depth perception, the former being unhelpful if you are trying to gauge distance on something else while keeping track of your target and latter being unreliable because you ship can travel at ridiculous speeds with the afterburners on, and I don't mean ridiculous like "Oh hey, motion blur, and I've already caught up to my target, that's great!" I mean, "AHHHAHAHHAHAA! Oh crap I flew past the battle again, now I have to wait for my afterburners to recharge so it doesn't take me 5 minutes to get back." The HUD also has a tendency to get overly cluttered with all the markers indicating enemy fighters (of which there can be a ridiculous amount, or ridiculous for a console game anyways) and destroyers and frigate and carriers and such. And commanding your wing seems a little unnecessary, seeing as how I rarely ran into a ship that was big enough or fast enough for me to need help, more often than not, I just end up making my wingman cover me and letting the rest attack whatever they want.
On the other hand, the freedom of movement and the ability to play around with certain maneuvers such as cutting my engines and turning around while my ship drifts on inertia and targeting the squadron I just flew past with missiles that can lock on up to 60 times (and I don't even have the fully upgraded missiles in my current game, I forgot what the maximum is), which means that the aforementioned unfortunate pilots I just shot past will each probably have at least 5 missiles with their names on them (it only takes two to kill them, but it never hurts to make sure), after which I can target the nearest destroyer and bombard it with torpedoes or a rail-gun or magnetic glaive-thrower, makes for a fun experience. The amount of control given to you in this game surprised me, given that they managed to put these controls on an Xbox 360 controller. The amount of destruction you can cause can make things boring at times, especially in certain missions, such as the one where you are pitted against one enemy pilot who is really difficult to shoot down but it is your objective to do so, the boring part was where I ended up destroying countless numbers of his backup ships, who just kept coming and getting shot down while I was aiming for my objective. Like I said, it's repetitive but fun, and it makes me wish there were more space sims for consoles, because even though I haven't played it in a while, I remember how fun it was to play Descent Freespace, and the level of control in Project Sylpheed is really good in my opinion, and probably a step in the right direction for getting a similar level of control to a PC title. Imagine a console game that gives you such freedom of movement and, unlike Project Sylpheed, has the multiplayer support of Xbox Live or Playstation Network, that would be a great game. Though from what I've read here, it looks as though I've missed most of the good PC space sims, if I thought this computer could handle any of them anymore I'd invest time in trying them out.