Abaranger is a great choice, but just wait a bit. Myself and the rest of Imagination Station are currently subbing it and will be done soon. Up to episode 36 have been released publicly.

I started with Zyuranger, for the MMPR nostalgia, but I wouldn't really say it's the best place to start, but i'm not going to go into why (not worth the explanation). Just find one where the team and mecha looks cool and watch it, i'd say. I personally like the older shows a bit more, since I don't care for all the CGI in the newer ones.

errr...okay, I guess you picked Dekaranger. Nevermind then lol

Deka's a solid choice, and it's easily my favourite, though the CGI effects have not aged very graciously. [:

I found that the cast was very likeable, and the ending was pretty satisfactory, which is where I find that a lot of Sentai series tend to drop the ball at.

Anyway, enjoy! Let us know how you liked it, once you're done! ^^

Zyuranger and dairanger were also considered but for zyu I'll wait for that official release if anything comes of that, and since abarangers not subbed I'll probably go Dairanger afterwards. Get a taste of the old and new

i like dairanger -= i wish saban use 5 main dairangers suits with white ranger

Imho, Dairanger is not that good, so I'd suggest to start with a better season of that time (meaning either Zyuranger or Jetman) or go with something newer, like pretty much everything from Deka onwards (except for Boukenger, because that's one of the weaker new seasons)

Here is my suggestion:

1. Start with Zyuranger.

2. Watch the sentai shows from the final decade of the 20th century from Fiveman to Timeranger LIKE A BOSS.

3. Then watch these in no particular order:
Hurricanger
Dekaranger
Magiranger
Gekiranger
Go-onger
Shinkenger
Gokaiger
Go-busters
Kyoryuger
ToQger

4. Then if you still hungry for some older stuff, watch some Flashman, Liveman, and Turboranger

5. Wow, you are this far? Watch Goranger, Denjiman, Sunvulcan, and Dynaman