OK, so I just played probably the worst game of my life. It was an hour long, in which I kept the Terran opponent on two bases the entire game, took 7 bases and managed to lose. Note that I'm in bronze, so please don't be too harsh on me.
I started off going ling/baneling, and saw that he was going tanks, so I went to mutas. I went into his base and found an INHUMANE amount of missile turrets. I'm talking at least 25. Throughout the game he continued to make them everywhere...probably had at least 100 (!!!) by the end of the game. I decide to just deny his expansions and keep him on two bases, eventually mining him out and winning the game. Turns out he spent all of his money on mass (cloaked) banshees and vikings, took out my corruptor/ling/bane army swiftly...ended up not having enough to build another base, with no army, no minerals to mine and at least a hundred larva.
Of course this is an extreme case. This guy will likely never leave the bronze league. But how do I deal with turtling Terrans when mutas just aren't an option? Should I have switched to roaches? I want to be able to end a game within an hour, at least...
Again, I'm in bronze, so go easy and basic, thanks. Also tell me if I'm being too vague.