A few general thoughts...
1. Look at your VPIP/PFR. If there's a huge gap between the two, you probably limp/call too much. If your VPIP is much over 24, you're prob too loose. If your VPIP is less than 13, you're prob too tight.
2. Look at your positional stats. Your VPIP/PFR in late position should be much bigger than in early position. If not, you're probably not playing position effectively.
3. Look at your win rate by position. Your win rate in late position (BB/100) should be much higher than in early position. If not, you're probably not playing position effectively.
4. Look at your flop cbet% and turn cbet%. If your turn cbet is less than half your flop cbet, you're probably giving money away, prob not agg enough, and prob not reading boards/villains effectively.
5. Look at your winnings for pp's, sc's, offsuit connectors, etc. Your winrate for the first two should be very high. Look also at which hands you win and lose a lot with - if there are any big surprises (i.e., you're losing money w QQ), go back and review hh's.
All these assume a sufficient sample size - 10k hands, for example, is too small to draw solid conclusions. On the other hand, just thinking through these types of things is useful in and of itself even if not a big enough sample.
Stakes make a diff - a 90% cbet is prob a good idea below 25nl and is prob
bankroll suicide at higher than 100nl. Tourney vs cash makes a diff, and FR vs 6max makes a diff (6max stats should be more agg than FR).
I know there are several articles here on stats which imply leak identification opportunities - I'm pretty sure ChuckTs has one somewhere...
As nugganootch suggested, posting your stats in one of the micro threads would be a good idea.
If you have any specific questions, pls feel free to pm me. gl!