You're right about the ammo if you've got the right weapon. The ammo isn't that big of a deal for me, unless I'm using a specific weapon like the L82 Enfield (not sure what it's actually called in STALKER but that's what it looks like).
STALKER is just too open, too much stuff goes on and I get lost too easily. By contrast in Oblivion it's easy to keep your bearings and track down your quests. And Crysis is technically quite linear, but the gameplay is open.
What STALKER could've done is what many RPG's do for quests such as Silverfall, DS2, -- split them up on your Journal/PDA between "Main Quests" and "Optional Quests."
Though, many of the "Optional quests" such as The Finding Strelok Quest-Line, depending on whether you do them or not, do result in what ending you will receive...
ENDING Info SPOILERS
...and even if you'll find yourself in a big final battle or not.
The game gives me little motivation to go on. I'm following the Strelok mission but they're the ones that are getting really tedious, making run to the side of the world and shit.Does it end up with something stupid like I was Strelok all along? I could see something like that working in a more cinematic game but not STALKER.
STALKER Spoilers -- Who Is Strelok?
Yes, you are Strelok.
Since your mission is to kill Strelok -- and once you find out, there's no longer and quests to go kill him. Nobody knows who Strelok is, but you. But, it would've should've been interesting if there was a quest to say frame someone as Strelok, a "suicide quest" offered b/c you find out you are Strelok so you decide to still go on to kill Strelok (yeah, that'd be funny, but screwed-up!), or some sort of mission where somehow people find out you're Strelok so you have to stop them from killing you.
Right now I'm having a hard time distinguishing if STALKER is more tactical or arcade. It feels like the game is undecided.
Cross of both.
I think it can be quite arcade, when fighting the monsters. Just shoot, shoot, shoot. They pretty much just rush you.
I say this b/c the game is often quite tactical when taking humans on -- and if you ain't tactical, expect to die. And fast. Especially when taking groups on.
EDIT:
Oh, since this is the Currently Playing thread, I'm all over the place with what I've been playing of late on the PC:
--Elder Scrolls IV: Shivering Isles
--GTA: San Andreas
--Sacred: Underworld
--Arcanum
--Timeshift