When I started in EVE one of the biggest disappointments was that asteroids did not block line of sight to targets, nor block weapon fire either. I found it immersion breaking; it was nonsensical that lasers and missiles would fly straight through a mass of rock with ease.
Before I played EVE I was in love with Star Trek: Starfleet Command and in that game the objects in space meant something. Get too close to an asteroid and *BOOM* you crashed. Go through a small asteroid debris field and see your shields deplete. Lose an opponent's lock on you by skirting behind a space station. It allowed a certain degree of tactical consideration and environment awareness in the heat of battle.
And then in EVE?
The only thing that structures and asteroids changed was the path of your flight, and even then you simply bounced off them. Sure, sometimes you could get caught up on the asteroid field and lose valuable velocity and transversal, but that's about it. I understand that CCP needs to make concessions to multi-player environments and processing limitations and gameplay accessibility, but it still sucks.
Over time I got used to it and adapted as we all have who have stuck around in this game. But I still lament the sameness of space. The new nebulae went a long way to breaking that monotony but it is still unfortunate that environmental effects are limited to one space mission where waves of a gas cloud damage your ship, deadspace pockets that limit warping abilities (and used to disable Microwarp Drives), and a few systems in wormhole space.
The ones in wormhole space interest me the most. I like the idea of all the common and well known rules of PvP combat being turned on its ear due to the system you just jumped into. It adds some spice to otherwise well known rules of engagement. I wish every region had one or two similar systems where things were just not quite the same. Something to give fleets a decision point: do we try and fight here where everyone's X module won't work, or next door? Does that hinder us more or less than our opponent? I like decisions, it makes life more interesting in game.
And yeah, I still wish asteroids blocked line of fire.