I think you'll like it. Link to the Past is one of my top games of all time but I'd consider myself a casual Zelda player after that. Some I liked, some I didn't bother with.
I thought I'd be the same with BotW. I had played both EverQuest and WoW for years and thought this BotW would be a kiddy version of Skyrim or one of those games. I ended up putting a good 60+ hours into it and loved it. I don't think it's a perfect game though. The weapon breaking is just not a fun mechanic and the puzzle temples while fun, feel like filler and some are pretty obtuse. It makes you want real temples like the other Zelda games. The few temples that are in the game are pretty challenging though.
The world is huge and fun to explore and the last half of the game where you are powered up is a lot of fun. I'd say if you liked Link to the Past, you'll really like BotW. Also, you owe it to yourself if you haven't played it to get the Link's Awakening remake which is even closer to Link to the Past.