Where are they now? (In character! Big spoilers ahead!)

Frasier went off the air nearly eleven years ago. That's a long time in some respects.

So, for example, Freddy. Freddy would be, what, 25 or so? That could mean he's in college, currently studying to be a psychiatrist like his dad. Maybe he surprised everyone and went into the police academy like his dear grandfather. Maybe he took the goth thing and ran with it, and is now part of some gritty, underground goth revival where he heads a Cure tribute band.

I dunno, what do you think?

I'd like to think Martin divorced Ronnie and is now with Sherry somewhere with a knife-throwing act ~

Nah, Martin wouldn't.

In the episode where Niles gets heart surgery we see a glimpse into Daphne and him having a daughter and introducing her to her newborn sister. So they have 3 at least.

...and I also like picturing Frasier and Roz together. Even if it was because they had made that pact to either get married ( or kill eachother) if they didn't find anyone...

I actually thought Daphne and Niles were introducing the baby to David! That's what I get for not re-watching the last season...
I'd like to think that Martin asked Niles to teach him to play the piano so that he can accompany Ronee when she's practicing her act. Maybe they even went off on a trip around America in a winnebago, the way Martin wanted to do with Hester. They probably took David with them.

Somehow I'd like to see Frasier back in Seattle, maybe finally setting aside his competitive urges and teaming up with Niles in private practice. And (and this is a long shot), he's with Claire. She was my favourite for him.