the Japanese food around Soi 31 is superb and very authentic. Great massage at Healthland at Asok. Join in Tai Chi in Queen’s Park at dawn or dusk. Movies at Terminal 21 or The Emporium. Arthouse movies at a tiny cinema on Soi 22
Riverside isn't great for tourists in my opinion - far better to relocate to Sukhumvit where you can walk to pretty much everything you would want. Find a hotel / apartment within a 5 minute walk of Phrom Pong / Asok / Nana BTS and you will be spoiled for choice
you've done your hard yards buddy, now it's your time to come to paradise and enjoy. Worst case you can pay for an overpriced Elite visa but I am sure there are other options listed above that will be more economical. Where are you planning to live ?