I jizzed over Super Mario 64 back in '96 and I loved it on DS back in '04 but I watched a Twitch 120 star speedrun last night.  The mechanics are still solid and it broke new ground back in the day.  It's not so great now.  I can respect its achievements though.  It ushered in a lot of stuff we still have today.

LBP is a good game and it's gorgeous to look at.  I think it would have done better if Sackboy were defined, though.  It was a design choice but I think it hurt the game more than it helped.  And the game IS a bit glitchy and the mechanics floaty but I can forgive it.  It's trying to do a lot of things at once.  Any game that has realistic physics is going to have unexpected results sometimes.

There is no hate here, just stating facts as to why Sackboy hasn't reached the popularity of popular characters like Mario (Ninty), Sonic (Sega) or even 'Chief (MS).  I'm studying character design myself, and when I look at Sackboy all I see is brown wool eyes buttons threads.  Clearly he is designed to be the all-around-toy, the toy that could be any toy.  Hence he is very generic and does not own any specific personality.  This is the intention of the designers at media molecule.  They never meant for him to be a "flag ship character" or a "Sony Representative" character, otherwise they would have made him more interesting.

Look at the design of Mario and Link, they have highly saturated colors and colors suggest a lot about their character.  By design I don't mean anything stupid like fashion or any bullshit they come up with in Milan.  I'm talking about product and graphics design, like the wheel is designed to roll or the color green is designed to tell drivers that it's okay to Go.  I guess you can say that a solution is DESIGNED to solve a specific problem.  In Sackboy's case the problem was "How do we make this character that people can turn to anything they like?" and Media Molecule devs/artists designed a solution to make his base concept forgettable and he can be anything you want him to be.  The design did not give him any personality because that wasn't part of the problem they were trying to solve, so they removed most identifying marks in him and made his base model very forgettable so that you can "make up any character in your imagination."

Remember I am not attacking Sackboy, he is designed to be as generic as possible so that people can imagine something else in his place.  Had their intention was to create a Mascot for Sony, Sackboy would have been a lot more interesting and possibly have a better name than "Sack" "Boy".  This would be hard to accept as most Little Big Planet fans have a lot of fondness for the games, and so most fans are emotional about this topic.  The road to acceptance is:

1. Denial

2. Anger

3. Bargaining

4. Depression

5. Acceptance

6. ???

7. Profit! $$$

lol, personality is derived from character.  I see with you I have to connect the dots to be clearer.  Example, if you see a photo of a hardened criminal, you can see anger in his features and possibly impulsiveness.  It's not hard to give him a personality from seeing his picture.  When you see vibrant colors in a character model either link or mario, the subconscious associates those colors with fun, being outside and running in the sun.  It implies outgoing personality and cheerfulness.  In Sackboy's case, brown and a dull brown at that, implies earth, decomposition, steaming pile, etc.  Nothing to associate with any character, only association would be dirt.  

It may be true that certain people are color blind, you may know people that can't see emotion in others, some people may have a hard time seeing personality from abstract concepts as well.  Just because YOU can't see it doesn't mean it's not there.  Green is green, a color blind and blind person won't see it but it's there.  I suggest learning graphic design, not just in relation to games, maybe it'll open up a whole world to you.

So, in other words - you're making the character up for Mario? Ok...