Nice initial impressions. If you read through the thread (yeah, it can be daunting...) you'll see that there have been in-depth discussions of fit, seal, angle, tip, etc. All have an effect on highs, mids, bass, etc. The right tips with the right seal and depth of insertion is critical. It seems perhaps moreso than many other IEM's. Some like the tips that came with them, some like a variety of others. I can only use foam-type and I love the sound.
Source files (great that you've got FLAC), player program, DAC, Amp... also all important in the chain. (But you probably knew that).
You see... the DBA's are very transparent. Bad source = bad sound. Poor recording or mastering or pressing, etc., will all come through loud and clear. But this is also true in reverse. Great recordings, mastering, etc., will simply shine.
Keep experimenting with tips and seal. Bass should improve markedly with the right fit. These will never slam you upside the head with bass. That's just not who they are. They are pure, clean, clear and outrageously neutral.
Congrats on your purchase and I look forward to more thoughts.
Ps. Your Englis is just fine.