I don't think I've ever heard 'being a bastard' in a positive light? Usually that's reserved for a, I dunno, a lid or cap that won't open or a stuck screw or something.
Ooh I have something for this! It actually made me feel better at a certain point in my life:
Thou, nature, art my goddess; to thy law
My services are bound. Wherefore should I
Stand in the plague of custom, and permit
The curiosity of nations to deprive me,
For that I am some twelve or fourteen moon-shines
Lag of a brother? Why bastard? wherefore base?
When my dimensions are as well compact,
My mind as generous, and my shape as true,
As honest madam's issue? Why brand they us
With base? with baseness? bastardy? base, base?
Who, in the lusty stealth of nature, take
More composition and fierce quality
Than doth, within a dull, stale, tired bed,
Go to the creating a whole tribe of fops,
Got 'tween asleep and wake? Well, then,
Legitimate Edgar, I must have your land:
Our father's love is to the bastard Edmund
As to the legitimate: fine word,--legitimate!
Well, my legitimate, if this letter speed,
And my invention thrive, Edmund the base
Shall top the legitimate. I grow; I prosper:
Now, gods, stand up for bastards!
tldr: "People give me shit for being illegitimate, but I was born of love instead of political duty. I'm no less human - maybe more! Also in a pragmatic sense I'm coming for my inheritance."
Obviously it didn't match my more modern situation, but I still really like the romance of it coming from that time period.
Edit: In case people don't know, "bastard" originally/technically means someone born out of wedlock. Obviously words change, but that's sorta where bastard sword comes from too: A sword from an unholy marriage of a two-hander and one-hander. also I guess Katanas are bastard swords, heh