Originally I wanted to speak welsh because it sounded cool and was a little more obscure than Irish and I wanted to be the cool one. Also because Eve Myles is welsh and I had a MASSIVE crush on her and her accent.
Now though it’s partially just determination to do it eventually (since it’s been about 8 years since I started trying, I think) and partially just that Wales is sort of my adopted homeland? I’m adopted and know nothing about my birth heritage, but I’ve been told I probably have a fair amount of some heritage from the UK and Ireland by multiple people. The first time I came to SSIW (back on the oooold forums with my old handle that I miss, Bixy) I mentioned that I felt more connected to Wales than any other part of the isles and was promptly adopted as an honorary Welshman. So I want to be a welsh speaker to forge a connection to my (adopted) heritage so to speak.
As for what I want to DO with it... I want to be able to experience another culture in its own language (at a distance alas why are you so far away???) and to be able to maybe spark interest in Welsh in other people.
And heck. I can’t do much to preserve Welsh in Wales, but more people speaking and reading Welsh around the world certainly can’t HURT the cause now can it?
(Sorry this got really wordy. I want to be a welsh speaker because for a brief period before my vocabulary expands, I’ll be forced to be more succinct!)