I'm sorry i noticed your post only recently, for some reason it ended up in pending posts tab which i was not even aware of until now...
Thanks for the feedback! Yeah, we made the Linux build cause i use Linux as my main work system and wanted to have a screen buddy there, too :)
- there is a voice pack selection available in the newest update, but being able to load your own is a neat idea!
- loading animation and effects etc. i can't say for now, we wanted to make more customization options but i cannot promise antyhing for now.
- shadow opacity should not be very hard to implement