Is there an order in which you complete the sidequests, based on your level?

No any sidequest scales to your level. I mean you can't do the story quests out of order (and the XP they give insures a minimum level) but the sidequests are wide open.

As to the limits on your character, if you put your starting int to 9, take the 4 skill points per level talent at 4 and get the int bobblehead early you can easily max everything but 3 weapon types (I picked neglecting melee, big guns and unarmed). My end character has 10 per, 10 agi, 4 str, 10 cha, 4 stam, 10 int and 10 luck pretty easily with 100 or close enough to 100 that I can put on an outfit to get me there in just about everything. Books made up the difference pretty easily and let me do that maxing.

What I mean by pointing that out is that you weren't really any more limited then you were in oblivion in terms of being able to do everything. So there was really no reason to cap leveling at such a low point.

I just hate the feeling of not progressing, it actually got me to stop playing pretty quickly after it happened. Knowing you already have everything you're going to have (except a point here or there from books) is kind of depressing in a way.

No. You can do any sidequest in any order. Except for The Wasteland Survival Guide - There are 3 tiers of quests, and 3 quests each. You have to complete each tier before advancing to the next.

Yeah I did a few weeks ago and I was pissed because I couldn't do the side quests (saved at the end). I needed 36 hours for it btw.

Anyway I started a new game and I already found a lot that I missed in my first playtrought like the Oasis and the Republic of Dave.

I have a question though is there a place where you can buy bobble pins? I have a lockpick skill of 100 and the hardest locks are a pain in the ass to open without breaking atleast one bobble pin (and gives a hell lot of XP);

Why?

Don't you get hooked by the game? I hear the sidequest are plenty and grateful.

Sadly, I am unsure. I always found enough pins in the First Aid boxes to ensure I had 20 picks onhand.

for pins the secret is to stop and restart if you mess up 2 or 3 times before the pins break. If you start to do that, then there's no problem.

I was rather disappointed by Fallout 3 tbh, played the PC version. Finished it maybe 4-5 days after I got it, suppose it would amount to 35 hours or so of playtime. I was already just a few hundred xp away from level cap (20) so I saw no reason to continue if my character wouldn't progress.
Who wants to play 15-20 more hours with nothing left to add to your character?
The game is also too easy most of the time, with the VATS you basically blow up everything with one shot after you get the sniper rifle and the chinese assault rifle.
Ammo is ludicrously simple to find and get, I had more than 8000 bullets in the end divided onto 4-5 different weapons and stimpacks are also way too easy to find (had over 250 in the end with each one giving about 100 HP...).
Never had a problem with caps, it was rather an issue of finding vendors with enough cash to buy the loot once you started finding things worth more than 200 caps each (rifles worth over 700 for instance, are almost meaningless since even the richest of the peddlers have maybe 6-700 caps unless you've repaired you stuff beforehand and paid them some).
I found myself trading back heaps of ammo and stimpacks so I wouldn't sell at a massive loss which just spirale the whole ammo/stimpack thing out of hand. What else would I do? Drop the loot or sell it at a heavy loss? Then what's the use of loot other than fixing your stuff?

Main story is way too short (as is Bethesda's style) and too many sidequests are similar and unengaging to me; usually it revolves around "go there and see what its like" or "kill those suckers for something bad they've done".
It really feels like whatever you do has no impact on the world, except the times when guards will automatically know you snagged something despite never having detected you (due to the karma system everyone in the worls knows immideatly whether you're good or bad and that's kinda lame).

I'm thinking of writing a full review and posting it, listing and arguing the better and the worse points of the title a little further. Just let me know if anyone wants a review from someone who wasn't blown away by this game!

I love when people blow through a game with multiple difficulty settings on normal and then complain about how it was way too easy...

Try super mutants on Very Hard, its not nearly the walk in the park normal can be. You'll find yourself having to do things like disarm with VATS to the arms and then kite with VATS to the legs far more often, you'll need stealth and perception to not get sniped from buildings and will definatly not have 300 extra stimpacks.

Also when the person SAYS go kill them there are lots of ways of approaching it. For example in one set you are expected to kill ghouls trying to get into a tower. You can A) kill them and get a reward from the guard, B) lower the towers defenses and let the GHOULS kill the guards, C) you can negotiate with the residents to let the ghouls actually live in the tower or D) you can kill all the residents yourself and let the ghouls live in the tower with their corpses.

Almost every quest has at least 3 different approaches, if you thought that wasn't the case you weren't thinking critically.

I finished it today. I really enoyed it, but it was a lot easier then I thought it would be.

BTW Bethesda should patch it so you can continue playing after you finish the main quest (under the condition that you survive said quest ;)