[SixOfSpades]

A couple of notes:
You can recruit and boot NPCs as often as you want, but be careful--if you boot somebody out of the party when they've been complaining about your Reputation, they might just say, "Fine, I'm leaving. Good riddance!" and never come back. Make sure they're not complaining before you kick them out. Jaheira will complain when you boot her, because she's been with you since BG1 and expects to be treated as more than just another face in the party. If you toss her around like a piece of armor, you'll hurt her feelings a bit and she won't really open up to you, but she'll still function just fine as a party member.

Why should there be anything wrong with Yoshimo? I don't like the Bounty Hunter kit, but he's a damn good Thief, and he can Dual, to boot. That doesn't mean he might be the only Thief you'll ever need, though: Many of the characters have their own unique strengths and skills, so make sure you don't let any of them die (even the ones you don't take into your party), and try to remember where they all are.

The boy Delon isn't just in the Government District--he also will pop up much later in the game and track you down, wherever you are, and tell you about the Umar Hills--if you haven't already gone there.