Hi, first time poster on any kind of forum, so taking the leap....

I have been on and off playing free chip and micro stakes, so not sure how much weight you will give my answer, however I find those games especially tricky as raising to thin the herd and gain fold equity doesn't work half the time!

If you limp AA early and it hits it will be hard to get paid off post flop. KK QQ are going to re-raise even a standard raise so you can get more money in pre. You get a raise out of JJ, AK, AQ, AJ, KQ pre to get more money in pre or just take it down. Still works if you're at a table full of maniacs. I just did it last week in a live 1/2 game. One guy was raising like 15x pretty much every hand that he was opening. There was also two other aggrotards behind him. Woke up with aces UTG and figured my best play was to limp/reraise. Yep, i did double up my 200$ buy-in. Everyone always saying limp reraise is AA so I put the line into my game using Axs when i want to play more pots against fun players for cheap preflop or back raise if there is a lot of dead money in the pot. A limp is an act of placing the minimum bet that is required to stay in a hand. When a player calls preflop instead of folding or raising, that player is said to have limped in. This is true only if nobody has raised yet in front. Depending on how you see the game, a limp might be a good or bad move.

You're right, position does play an important part, however with the UTG situation there are several considations -
a) the type of player the limper is and their tendancies (Loose/Tight, Passive/Aggressive). Use their previous hands that have been showndown or what boards they have bet on, should give an indication of what type of player they are. Do they regularly limp-call or limp-raise? Simply increases the risk that you maybe behind if they are Tight.

b) you're own table image - as before Loose vs Tight, Passive vs Aggressive, if you appear Loose-Aggressive (LAG) your raise will not be believed by the limper and (my next point) the people to follow.

c) Types of players and Effective Stack Size i.e their stack sizes - again if they can be gauged to be loose aggressive, marginal hands may do well, but you are gambling a little (pair to overcards kinda situation. Conversely, if they are tight, they are more likely to have a had that would be folded, but that one time you face a big re-raise from a tight player....panic, and best to fold. Which leads to stack size, ask yourself would you want to risk your entire stack if you got re-raised by the big stack to your left? The anser to this can be helped with the previous couple of factors - if their are loose and you have a tight table image, chances are maniacs will call with something like K9o (Bad) and tight players will simply fold because they don't like their hand (unless they hold a monster - that's the risk), therefore you have a chance to triple,quadruple up if youre against a loose limper and a loose re-raiser.

Poker Limp Raise Money

and d) Your own Cards - some may consider this most important point, but if you only ever raised with AA, KK, AKs and AKo you'll scare yourself into submission. Poker is a game of information and representation - from the information you have about betting patterns, stack sizes, equities, player types and tendencies, and ofcourse position - you will make some raises and re-raise with lesser holdings more profitable in certain situations.

Poker Limp Raise Back

Poker Limp Raise Meaning

Ultimately, try to get a feel for your opponents, how they play, what hands they value. Sometimes the probability of winning a point is based on Pot, Bet, Stack sizes and odds isn't all there is.