Everyone who has posted in this thread should come and have a look at the "Single in xxx(month)" challenges going on.
I dare you all to join us and use JUST ONE lens for a whole month, posting a picture each day.
Some of us have been doing this for a whole year now, you'd certainly learn a lot about your chosen lens, then you could come back here and adjust your choice!
You can find the Single in ... under Mini challenges in the forum section.
Me? I'd be very happy to just have the DA21 Limited lens, it can do it all.
Cheers, and see you on the challenge soon...