PF 90 Gel by Precision Hydration — I've been fuelling with Precision 90g gels for multiple years now, as have a lot of my athletes.
The texture goes down easily, the taste is neutrally sweet (there are much sweeter options), and the 90g screw cap packaging makes this product a game-changer for so many athletes.
My only negatvie, and I've heard this as feedback too, is that they can be a bit addictive and it's easy to over fuel!
The Big 40 Gel - Caffeine by Bix Hydration — Bix was one of the first to add electrolytes into their gels. I find this works really well for people with high or low sodium concentrations, as it either makes it easy to accumulate the total amount needed or the 200mg in each gel, especially taking two gels per hour, can be sufficient for a lot of people, allowing you to just drink water.
The 40g packet size makes 80g/hour very achievable, and I have many athletes who find 70-85g/hour to be their sweet spot.
But the main thing for this variety is that the 75mg caffeine goes down a treat. You do get the standard caffeine bitterness, which some people taste more than others, but the consistency and ease of consumption are plus the potency of the caffeine makes this gel a very fun ride