What about the one which goes, As long as there is something worth fighting for i can keep fighting. [b], for example some of the fights in Hajime no Ippo and especially DBZ where its with almost every single enemy they fight.

Ahh~ There so many to list from. (& most of 'em are prob. been said already, above)
Horrible SHOUNEN cliche would be like the time when:
"come to the darkside" - we got candies, no really. w/e character that may be ended up going to the villain's side b/c its the only option
the emo best friend becomes a villain & is somewhat thinking of his actions is right or not. - the protagonist always have to face off w/ his or her best friend & try to make the best friend to come back to 'em.
You see plently of that.
taken angry/frustration out on others, BLAMING on others. Things doesnt work out right in life, someone in family/friend got killed & protagonist was there but wasn't able to do anything at that time BUT then somehow the protagonist gets the blame for it. WTF?
the guy likes girl but girl doesnt & the guy does everything he can to get the girl's attention & when he finally does its b/c hes a super hero/unique/ or w/e the reason is.
Mysterious quiet cool kind of person w/ a dark past. - are usually the one out for revenge. Typical.
Misunderstanding! whether its b/c lack of communication or what, it drives me nuts. Others get mad at the certain person b/c he or she thought the person is the cause of it.
Risking your life for an enemy or stranger. Wow, gotta say, thats one super hero. Justice!
Super killing machine w/ no heart - ends up having a heart or mind of its own. & usually knows that the he or she is at fault so thinks only way is SUCIDE.
Protagonist are usually good guys. - they usually win.
Most of time, he or she wants to protect their love ones.
Happy ever after - Horray, the world is save. No need for violence no more.
Fight the mini boss to get to the bigger boss. - Ooo, minions first than its mini boss and than the final boss.
"You are the ONLY one that can save the world/him/her" - Why? Some sort of a messiah? So special, ne.
"Forgive me" - Villains dies & then relaizes what she or he did wrong was a mistake and theres no turning back. Of course.
Sibling/Family complex - Ahh~ get over it already. Dote 'em so much the person gets spoil or the person w/ the complex is overprotective.
Overprotective - Hide a secret b/c doesnt want the love ones to know until its a lil' late after it happens. Pfftt.typical.
a girl so pretty beyond words.. - everyone admires her from a distant & thats its not possible for the protagonist to be w/ her but somehow he does (or vice versa)
Irrational or Over confident - doesnt think before he or she acts, got too cocky.
Emotion-less person - ends up does have 'em, feelings.
Minions - attacking the protagonist or semi-characters. Damn, so many followers. They must either be so devoted to their master or the pay is good or they have nothing better to do or repaying their debt w/ their life.
Coloring – bad guys are darker colored w/ their clothing. Heroes are lighter color.
Power is everything – to overcome your opponent you must have either physical strength or social standing.
Jealously – becomes nasty, the person gets jealous ends up being the bad guy. Or protagonist sees his or her too weak of ‘em self ends up wanting to become better than his or her rival.
Getting hurt.. gets their butt kick pretty bad but survive from a major deadly blow. Such will power!
Transformation.– a sore loser evolves into hot looking person w/ overwhelming physical power but then changes back after incident is over but doesn’t remember what she or he just do.

I know there’s a lot more, although I can go on and on and on..

There is one think that I keep thinking when read some of shounen manga..WHERE THE HELL IS THE PARENTS I always see a romance manga and the progatonist always lived alone in apartment room..

A character get's his ass handed to him in a fight by an ultra-powerful villain, and, of course, the character survives and then trains for a couple of days and comes back equaling in strength to the villain who just kicked his ass.

I've read just about everyone's post and noticed that Bleach seems to have EVERY single shounen cliche in it. So why is it so damn popular?

There is one think that I keep thinking when read some of shounen manga..WHERE THE HELL IS THE PARENTS I always see a romance manga and the progatonist always lived alone in apartment room..