I come asking help and some suggestions. I'm in mood of

>>51082588
Eclipse Phase.

>>51082588

You have a lot of options. I agree with reskinning an existing space opera setting if one can be found that fits your needs.

The obvious place to start is star wars. You can strip out jedi and the Force and have just about everything you need-- especially those space dogfights.

40k RPG, Traveller, and Serenity RPG are all other options-- though none of them have the dogfighting element down as well as star wars. 40k in particular is wrapped around the assumptions of that setting and hard to reskin to a lighter, happier setting. Firefly was based on a Traveller campaign that Joss played in during college, so both are appropriate.

If you're an experienced gamer, you don't need me to tell you about GURPS. Spaceships has a fantastic design mechanic that lets you do just about anything and yet still be manageable and fun-- it was written by the same guy who did the awful Vehicles supplement for 3e that people still bitch about, and man did he ever learn his lesson. You'd use GURPS Lite as the core, then borrow from the Basic Set, Ultra Tech, Bio Tech (for aliens), and Spaceships. Then add martial arts and psionic powers if those elements are in your setting. Much more work than reskinning star wars, but you get a lot more control and precision and reskinning can be a lot of work too depending on how different your setting is.

Battletech has lots of stuff that's a very close fit... but the mechanics suck and if that's what you're picking it for, then it's not worth it.
>>51083493

A shit game for shit people. And totally inappropriate for OP's concept.

>>51082588
>lighter, faster and more narrative systems.
Traveller, mongoose edition.

There's a traveller thread up now where you can get all the PDFs

>>51083999
As much as I like Traveller, I wouldn't say it's particularly narrative.
It is, however, pretty rules light, in the sense that most of the crunch comes from subsystems and the like. Maybe rules modular would be a better term? But definitely the core system is nice and light.
Also, Traveller chargen is really really cool

Op, if narrative is a must then I'm 90% sure a sci-if PBtA game exists, but I can't remember the name of it
Oh, and Stars Without Number is pretty cool, and has some neat supplements. It's also manages to be both a love letter to traveller and its own thing, which is neat

>>51082588
Stars Without Number. Even if you don't use it, stealing the Faction Turn rules and refluffing stuff for your game go a long way toward making the world/universe seem a lot more alive.