AKo - right idea, wrong sizes.
I read your description first, and thought, sounds like TT should have folded and you just ran into someone on entitlement tilt. You’ve min bet the flop though. Turn size is better, setting up a river jam, but then you go half pot with only 3/4 back when all the draws miss. People are already looking for any excuse to put you on AK, I think with these sizes you may as well have turned your cards over and shown them. Go 1/3-1/2 on the flop and then jam on this brick turn. You want to give yourself a chance of folding out AJ and KQ, and you’ve let worse continue instead.
98o
This one I didn’t read first. My thoughts when it checks to you on the river - I’d like to see a bet of around 350. See that you bet 320, close enough. It’s totally believable you have a K here. Your bluff doesn’t have to work that often, and really, what’s going to call even if they suspect your bluffing? You should be making this play every time.
Your reasoning for the size is ok, but personally I would try and find a hand you can reasonably represent and then figure out what size that hand wants to use. Trying to guess what different sizes will look like to different opponents is just harder to apply universally. 2/3 seems about right for K6, K7, etc. Exploitatively you’ll often want to use bigger or smaller sizes for your bluffs, but I wouldn’t in this spot. I think if you use a small size here you will always get called by 33’s, 44’s, 66’s etc, but they might fold to 2/3’rds. It’s not believable you have a strong enough hand to use a larger size, so I think that gets called light too.
AJo
The lead is good, size is good too. The turn, absolutely keep barreling, but use a bigger size. You have all the sets here, A4o and 64s, a bunch of two pair, and the BTN can have basically none of those. Most of their overpairs would have raised the flop, so their sitting there with 2 overcards almost all the time. I’d be betting at least 3/4 here.
When you go small, I’d be giving up on the K river. The K should be a good card for them, and it looks like you have 7x at best, so the button should be bluff raising here 100% if they didn’t hit the K. I would guess they had AT-AQ.
If you bet big on turn, you’re saying you beat any 1 pair hand, so the K is not scary, and I’d just be all-in. The K being a good card for them actually makes the river jam seem a lot stronger, as long as your opponent is at a certain level.
These are all good bluff spots, and that’s the most important thing. I do think you need to think more about your sizing, but choosing the right spots is way more important than getting the sizes spot on.