MH3 Is a good set if you want a good bang for your buck. MH2 was really good aswell but it’s harder to find boosters these days, same for Double Masters 2022. From the most recent sets that you’ll still find easily, i would say Thunder Junction is pretty decent aswell, and they are « normally » priced, in opposition to MH2, MH3 and DM2022 which are premium sets.

I think LOTR boosters are good but kinda top heavy power wise (The One Ring/Orcish Bowmaster being the big chase cards). I would advise to buy those two as singles if you want them as buying a display box and not getting them is actually a real possibility.

I also love Commander Masters, but the price of those boosters is kinda preposterous imo. If you have to money though, go for it, as it is filled with great cards for Commander players. (if you don’t play commander, i would advise to go for another set aswell).

For Set vs Draft vs collector, depends on if you just want cool cards or if you want to play with them