Well, I feel like that two (except on number 3 I want to substitute "genius" for "strengths". I want you to know that all the INTs I have met I:
1) Respected greatly
2) Saw their Genius
3) Found them HILARIOUS when they chose to tell jokes
4) Got jealous of their clear thinking ability
I think underdoing is a problem with many Ns in general (even NJs who are very active, you find SJs are even more active) N causes you to muse more and this can intrude upon action.
Don't worry there are people out their who respect you. In fact despite being a minority I bet there are an uneven number of INTs who rise into great positions in society because of this minority aspect.
In conclusion: "It SO doesn't suck to be an INT".
I gave you 4 reasons that beats your 3? Right? Help me here Ts, right, right...never mind.