First, nice job posting these hands. Your suspicions were, in fact, correct. There are some HUGE leaks here. But reading through the above posts is going to help that. Here are my thoughts.

Hand 1: As played, you DO HAVE odds to call. Jym's "shove the flop yourself" is even better and will often fold out made hands like QQ. You really need to work on your understanding of pot odds, implied odds and fold equity. If you don't know what some of these terms mean, either post a reply here or pm me.

Hand 2: Not horrible. I prefer raising the flop instead of calling it, if I plan to put any more chips in. As played, I check behind the turn and call a cheap river. A lot of this is read-based. He'll miss this flop a bunch and barrel it with a cbet, so allowing this hand to develop isn't bad especially if he's a 80% cbet type. Still, you can't auto-flat QJo preflop. You need deep effective stacks and a reason (based on reads) to believe you can outplay this TAGG postflop. 'Cuz it's gonna suck when he has KQ here and you need to get away from it. What swig said is true - you're probably flat calling way too much preflop, and it makes for tough spots.

Hand 3: Don't try to steal without SOME high card / big hand value. Keep your stealing range to two cards 9+, Ax, some sc's, Kxs and K9+ - - unless you have read on BOTH players in the blinds. Two reasons for this. First, you won't have to roll over and play dead when you get called/raised. Second, when you do catch a piece of the flop you'll have decent equity most of the time. Then you'll be able to leverage your position and equity to outplay your opponents. Think about this - you gained almost zero equity in this pot by hitting the flop, and the "hit flop" had you putting more chips in. Sucks, don't it? So steal with the good stealing hands and not with low card junk.

Hand 4: Don't get involved with 94s on the flop if you're not happy shoving all the chips in when your 9-high flush comes in.

Hand 5: Probably the time check behind a turn for pot control. I hate to play pot control, personally, but big preflop hands like JJ and QQ lose much of their value on Axx and Kxx flops. We're just not happy getting into a big pot any more. Time to turtle up, imo.