The second hand you posted is the most interesting I think. I'm hardly the most experienced poster here but this is my take for what it's worth -

I think that the most important information here is that villain rasied preflop UTG. This rules out alot of hands that would beat your.

I dont think we can put him on anything that gives him 2 pair or a straight. I also don't think he can have an overpair - AA would virtually always reraise preflop, KK would reraise you at least 95% of the time - unless you have any reads this is a reasonable assumption.

At $25NL I see very few people raise preflop with low pairs (ie. 66-88), so a set is unlikely. Again, in the absense of any reads I would think he doesn't have a set.

Therefore, I think this hand is a call, and the majority of the time I would expect to see villain holding JJ. Perhaps TT.