Evals for my two newbies

Leg type is a general indication of how a horse runs - it has nothing to do with physical properties of their legs. There's a few main leg types, that you must choose from:
Closer, Mid Pack (Mid), Preceder, Front and Versatile.

Each of these positions has strengths and weaknesses, and if you mismatch one to the personality and sometimes the distances a horse runs, you can end up effecting your results.

Here's a description of each leg type. Note that variations within each leg type can occur, but I'll address that later.

Closer: A horse dubbed a closer runs in last or nearly last place for the majority of the race. They come slow from the gate for the most part, and save their energy until a certain point into the race, where they sprint up ahead and into first, usually near the very end of the race, hence the term "closer".
In SPRINTS, these horses need to be fairly aggressive, since they don't have much time to act. IN MID-DISTANCE, they can be sweeter tempered, and staying behind lets them avoid fighting for the most of the race.

Mid Pack These horses prefer to run where the majority runs. When you see a race, and you see most of the horses bunched together, between the first and last place? That's mid pack. They tend to make moves for the front anywhere midway or near the end of the race.
Any aggression level works here, for any distance. I find mid pack a good place for a sweet horse and a mild-moderately aggressive jockey. These horses also tend to be more versatile than their peers in the other groups, because they're capable of duking it out with large numbers of horses, and depending on where they run in the pack, can be closer to a preceder or closer in nature.

Preceder This is my personal fav for a position. The preceder settles in a position anywhere from second to fourth (depending on the number of horses running, and the number of frontrunners) for most of the race before sneaking into first at some point during the last half of the race.
These horses need to be clever and of at least average aggression, though if they're too aggressive, it can backfire, too. If they're not, they run risk of getting boxed in, or swallowed up by the middle of the pack. They need to be clever because this is a position largely based on strategy of when to outrun who; if done correctly, a preceder can easily drive the pace of the race. They need to be aggressive enough to hold up against frontrunners, BUT if they're too aggressive they won't listen to their jockey in this position, rather, they'd be tempted to break and run.

Front/Frontrunner A horse with the "front" leg type has the most simple leg type. Frontrunners break fast and run faster. They stay at the front at all costs through the entire race. Despite the simple plan, it's got some nuances.
Good for: Sprinters, as there's not much time for horses to catch up to them. Also, this position is good for aggressive horses - they will not get caught up "battling the pack" and will instead keep to the front where they can focus on running, not beating the poop out of others. Generally, shorter distances = more and more frontrunners.
Disadvantages: Unagressive horses will end up running in front of horses that wish to kill them - that will NOT be good for them. They won't die, but dominant horses will drive them faster and faster and they'll burn out, or need too much urging.
Frontrunning at a distance: This is possible, especially for large, aggressive horses that seem to have an endless pool of stamina. As very long races are slower paced, a frontrunner does not have to run at the speed of light for 12f, but rather can go a little slower until the end.

Versatile These horses can run any style the jockey wants of the above. I do not recommend this! Ever heard the saying "Jack of all trades, master of none"? The same thing is here. Yes, this horse can run anything, but are the good at them? Choosing from two SIMILAR styles is okay for a versatile (ex, versatile between mid pack and closer), but hopping around styles doesn't give a horse a chance at routine or perfecting how to run. If you did track and field, would you do shotput, longjump, the 50m dash and 3000m run all in one day? You could. But would you do as well as someone who focuses in on only one or two of these, given the exact same training time? Probably not. It is possible and can be done, but it isn't a wise idea.

Sub leg types: It is possible to just list one of the leg types on a profile and leave it there, and the horse won't do any worse for it. Sometimes, if you have a very good idea of how you want a horse to run, or over workouts find that this "subtype" works, use it. For example, my horse Executioner's Apprentice. He is a preceder, with a sub type of "stalker". That is, he hangs very close to the horses in first or second place, and pushes them. He always moves fast enough to threaten their position, which forces them faster to stay ahead - and quite possibly TOO fast for them to keep up the pace, which makes his job easier when he makes a move, he just needs to pass tired horses. Other preceders might stay further back a bit.

Other examples are closers who break fast and stay in, say, 5th out of a field or 7, closer to mid pack. The permutations are endless, and if you have an idea, you have to type out a running style for them. Otherwise, just stick with one word and everyone still had a good idea of how that pony runs.