in a restricted space doesn’t the bigger handle take up more room compared to a plain chrome grip?
yeah, but to be honest, its really the length that gets you, not the diameter of the handle.
I just assumed the metal handle went full tange to the bottom of the plastic. Does it only go some of the way? I figured it would be heavier than a chrome one since it’s metal plus plastic? And their plastic is real dense usually
If you take a plastic handle off, you will see there is a reduced diameter tang. It's pretty long, but obviously not quite as long as the plastic. If memory serves it's only about 1/2" where a chrome handle has a nice swell. That's a lot of metal. And you can feel the difference in weight when you pick them up. And the balance is different too.
if I was going to get one to try out which makes the most sense for plastic grip? Reg length, long length, stubby length and straight or flex and which drive size? I mean we have all of them anyway right

but if I was going to add one for plastic handle which one would I see the most difference with?
So, broken record time, but remember you asked!
I think every mechanic, pro or amateur, needs an SHLF80A, which has the cushion grip. You can really put a lot of grunt into that and that cushion grip isn't so spongey you don't have control, but is spongey enough that you can pull really hard without hurting your hand. That's my #1 ratchet advice. I think everyone should own that ratchet. Impact guns just don't fit everywhere and if you don't have a lift, they can be even harder to fit in places. The SHLF80A is an amazing piece of kit.
Next, I really like the Snap on FHLF80A. That's the 14" (?) flex head, 3/8" version of the above. This,
or literally any of the competitors like it, should be in every mechanic's toolbox. This is the first ratchet I reach for for many many jobs. Ratchets like the F80, mid length, chrome handled, often included in kits, I find to be the least useful ratchets. I like long flexes with soft grips, then stubbies. Long for leverage, short for speed.
Ratchet #3, THLF72, which is the Snap on 1/4" version of the first 2. The Icon version looked pretty attractive to me. I just bought the round head Icon model and I like that. I use 1/4" a lot. Dual80 ++++++ (all the other similar-ish mechanisms) have allowed us to use long 1/4" drive ratchets in engine bays without worrying we'll strip their heads. Pretty sure all the new, decently made ratchets are like that. This has really revolutionized 1/4" drive, which has so many advantages for access, and speed. In many many engine bays, for 10, 12 or 13mm, you really can probably stick with 1/4" drive. 14mm might be pushing it. But I'll use my 1/4" THLF72 to reinstall up to 15mm. Pretty sure the 1/4" drive ratchets naturally have a bit less back drag than 3/8". A LOT of guys here have 1/4" ratchets with 3/8" anvils in them (I don't yet, but I may well do that to a THLF72).
Hopefully I answered your questions. No, I don't think it's super advantageous to have short ratchets with plastic handles. They can be nice, but just aren't my personal preference.
Edit: I think there are a lot of opinions about ratchet handles. Makes sense. They are super personal. But be beware, there are people who don't like the IDEA of a soft grip. I may have been one of them. I had craftsman ratchets with hard black plastic grips years ago.
The Snap on soft grip is something you have to try and
actually use (not just stand in the truck holding one). The Icon has a different texture, different sponginess, but feels
really similar. I liked the ones I held in the store and I like the grip on the Icon roto I bought.