I'm afraid the bad he's done still far outweighs the good. And if he succeeds in getting his immigration plan passed, all that "good" will be repealed when the Democrats get their permanent socialist majority after the grateful illegal aliens (now voting citizens) get the right to vote. At that point we can kiss the RKBA arms and the rest of the Bill of Rights goodbye.
That immigration plan is the death of the Republican party, and of our country as something other than just another SSR. The immigration fiasco is the worst thing I've ever heard of or imagined for the future of this nation.
If any major point from the Senate's plan becomes law, our country will suffer greatly, but it hasn't happened yet. That body needs to be held to account in a bad way (my two Senators voted the right way, btw). But George Bush isn't a Senator. He's a President with a penchant for signing whatever retarded bill comes across his desk. The Senate is to blame so far. Hopefully the House can hold the line. The best case scenario is no bill right now and a devastating 06 election cycle.