I agree - if you got players that you wanted, then it's no big deal if you had a FEW dollars left... and on a $200 cap, I'd say having $10 left is about the most that I would say is acceptable.
However, calling out players for $1 that you expect others to out-bid you on is dangerous. It's relatively safe for blue-chip players (e.g. "I don't want Barry Bonds, so I'll call him out for $1 and let someone else drop a bunch of their cap on one player"). But for cheaper players (like Gavin Floyd who is probably only worth $1 if he's worth a roster spot at all), you have to be prepared to take the player if nobody outbids you. A good example of that might be Jason Giambi who could be a big lump of fatty-flesh without the JUICE... call him out for $1, and raise to $4, and you might be stuck with him.
Also, while it's perfectly fine to end up with a $1 player that you had valued at $4 on your roster, having too many of those may really hurt your team. It's like loading up with prospects insead of signing blue-chip players. As long as you used the $3 you "saved" on that player to edge out the bidding on a Todd Helton, then you'll be fine.