TvT HOTS :-!

-One thing you need to do is get a faster third vs a terran who you know is going pure mech, even if it is just dropping the orbital for the mules. You have enough minerals for the command center at 9:30, and have 700+ minerals at 10:30 and dont drop the command center till 12:30-13:00.
-Vs a pure mech terran, I suggest not getting tanks if you are focusing on bio. They cut into your upgrades, and cut into your medvacs that you need early. You only got one tank, and invested into the +1 vehicle upgrades so that was a really expensive tank.
-Since your opponent is going pure mech also, hellbats are just going to soak up a lot of the your tanks damage. You really should be gettting air weapons instead. His vikings are his only anti air, and they benefit from his mech armor. If you dont get air weapons for late game, you are never going to be able to get air superiority.
-You did the one drop when you got your first two medivacs (which did good damage), but other than that you rarely went for more drops. While a meching terran is on 2 bases it really is kinda hard to drop them since they are so turtle, but when you see them aggressively going for their third, that is your queue to start dropping again.
-Once a meching terran reaches a critical number of tanks, you aren't going to be able to push them (map dependent). By 17-18 minutes you should be around your fourth base and transitioning into air with 3-4 starports. (again only if terran is going pure mech, vs bio mech you need tanks). Being on more bases, you should be able to easily wrestle air supieriority and wear a meching player down.

As a side note: need more medvacs and marauders. While dropping his main, like you did earlier, poke around looking for vulneriable tanks and bases with your main army while the hellions are away defending. You're Bio ball shouldn't be clumped up all the time, split them up a bit and keep poking different areas of the map so that the other terran doens't feel comfortable knowing where your army is and marching out with his entire mech ball.

-9:30 third
-you have too many tech labs at the start. 4 rax all with techlabs. you were lacking marauders last game, but this game you might want to open with a few more marines. Marauders eat up a lot of minerals early on and you'll end up with a lot of banked gas and not enough minerals.
-TOO MUCH GAS D: 1500 banked gas by 10:30: stay on 2 refineries till you start adding medvacs. Maybe a third if you are going early mass upgrades but waaaaay too much gas.
-Need more medivacs and they were really late. Your 12 minute poke to check the third was good and did fair damage, but there really should have been medvacs with it.
-Ship weapons No vikings
-You are keeping your army too balled up, and while you are doing some drops, dropship harass in the higher levels of play should be used more to push your opponent out of position where your main army can land some good blows. You need to move around with your army more while you are dropping, or be poking in multiple places at once. Mech terran is really really good at holding one directional attacks. Especially on this map, mech terrans have to spread their tanks out super thin, multi pronged attacks are vital.
-Fourth was super late.

- this wasn't a vs mech game. This was a 6 minute proxy rax? (wrong replay?)
- 2 player maps, always have your scouting scv scout your immediate areas. Had you seen the two barracks at your third, you could have easily pulled 8 or so scvs to auto repair that bunker.

-again, need that 9:30 third. You could afford it but you had 3 marauders queued up in one baracks.
-early medvacs late gas
-Late third again. Mech terran had thier third before you which is not good.
-after 1/1 you forgot your upgrades for a long time. banking a lot of gas because of that.
-That drop into the natural and main was sooooooooo gooooood, you killed off most of his tanks and forced all the ones at the third to fall back. YOU NEED TO USE MULTIPRONGED ATTACKS. you could have easily had the third and fourth had your units ouside your natural been more active.
-after 2/2 you forgot 3/3
-you got +1 air but no vikings again. and need more medvacs. (huge bank at 19 minutes.)
-he has vikings with +3 armor and you still have +1 weapons.
-you would have won instantly with that nuke at 30:00 had you not lost your whole army in it as well. In my oppinion, I wouldn't rely on nukes to catch a mech army off guard. You launched like 6-8 nukes and finally landed a hit. Just invest in vikings and transition into battle cruisers or even banshees. He had almost no anti-air. 6-8 nukes + 10-12 ghosts is worth more than 2 bcs and 12 vikings. with gas to spare for upgrades.
-you really needed anti air. It got to a point where you were so marauder heaving you had 2 ghosts as your only a-a.
-You really need to transition into BC's or baneshees. You had a pure marauder force with occasionally 2-3 medvacs vs tanks, hellbats, ravens, and vikings. the ravens alone would have killed your army.

-One thing i'm noticing is that you are constantly checking bases that a bio/biomech terran would take and not the bases meching terrans take. I suggest looking at the maps, other players and vods because you are poking at the wrong bases and not realizing that the other terran is on 1 or more bases than you. Meching terrans expand in a completely different direction. (also part of having your bio force moving all over the map and not just in a ball. You are too passive with your bio ball. Split them up and be constantly looking all over the map).
-Also, you cant be attacking tank lines head on like that. You need to split your units up and hit multiple areas.