Too many multicams. This can be cool because lot's of games can be reduced to 'team multicam' vs. everyone else, but feeling like a snowflake can be neat too.
I would recommend buying what you like purely based on what you think looks cool, and then buying a rig in a neutral colour like OD.
Then later on down the line, you may join a team that uses a specific camo, and you can just move all of your neutral gear over to that.
If you like Flecktarn, you should go for it.
Flecktarn has been extremely effective everywhere I've seen it used, spring, summer, or fall. Especially fall. (Prairies, Northern Ontario, Newfoundland)