Pretty much this.

I've been interested in other Sentais, but I don't know what it is about sub groups never completing Sentai subs (Rather, the series I want to watch :lol)

Shinkenger was my first but I watched Go-Onger at the same time thanks to PR RPM

still waiting to watch Hurricanger and Abaranger though im dyin to watch those 2

My first would be...

Oh, God. An old VHS sub of Gingaman VS Megaranger in 1999, and from there the first half or so of GoGo V, and then a good chunk of Megaranger.

GoGo V and Megaranger being completely raw with no subs, mind you.

Mine would be Boukenger. Can't remember how I wound up at TV-Nihon(I think I was looking for Zoids Genesis subs or something), and saw that up there. Thought why the hell not and gave it try since I liked Power Rangers till my schedule kept me from watching episodes. Been hooked ever since.

I started Dekaranger a few weeks ago, but haven't been super impressed with it. After two episodes I took a break and started Gokaiger. I'm 7 or 8 eps into Gokaiger and 4 into Dekaranger.

I'm thinking that in general I will find that I'm not really a Sentai fan. Kamen Rider yes, but sentai no. But I'm not sure yet. Gokaiger's been okay so far, though all the cameos by past rangers and homages to past teams is going completely over my head, so I'm not getting the full effect of the show.

Magiranger!!! :D

Gokaiger was the first one I started to watch, but the first one I've watched all the way through is Shinkenger. Both are great shows.

My first I believe would be Shinkenger. I say I believe, because I started it, then while it was airing, I started/finished GekiRanger and Boukenger. So while those 2 were my first completed series, Shinkenger was my first started one.

Gokaiger, I had known about Sentai from watching Kamen Rider, and when it started airing I decided, why not? Then I fell in love with the show, I've watched a few episodes here and there, trying to get through Dekaranger right now.

The first Sentai that I can remember watching was Denziman, and I just kept watching from then on till Turbo Ranger, then I didn't watch anything till Power Ranger came on.